WorksheetsPhysics A2 level Quiz
Total questions: 108
Worksheet time: 57mins
What is the formula for angular displacement?
ω = 2π / T
a = v^2 / r
v = rω
a = rω^2
What is the unit of angular speed?
m/s
m/s^2
rad/s
N
What is the formula for centripetal acceleration?
a = rω^2
a = v^2 / r
F = mv^2 / r
F = mrω^2
What causes centripetal force in circular motion?
Friction
Normal force
Resultant force
Gravity
What is the relationship between velocity and radius in circular motion?
V1 = V2
V1 = r
V1 < V2
V1 > V2
What is the formula to convert degrees to radians?
π / 7
2π / 3
180 / π
π / 180
What is the formula for angular velocity?
a = rω^2
a = v^2 / r
ω = 2π / T
ω = θt
What is the reason for keeping your head towards the centre on a roundabout?
To avoid dizziness
To increase speed
To decrease speed
To maintain balance
What is the term used to describe the time taken for one complete oscillation in Simple Harmonic Motion?
Period
Displacement
Frequency
Amplitude
In Simple Harmonic Motion, what occurs when acceleration is proportional to displacement from a fixed point and in the opposite direction?
What is the term used to describe the frequency of a sinusoidal oscillation expressed in terms of radians?
Amplitude
Frequency
Angular frequency
Displacement
What type of oscillation occurs when resistive forces cause the energy of the system to be transferred to the surroundings as internal energy?
damped
reduced
resonance
critical
In resonance, what happens when the forcing frequency matches the natural frequency of the system?
the amplitude is the lowest
the amplitude is the highest
the frequency is the highest
the damping is critical
What is the equation used to describe the interchange between kinetic and potential energy during simple harmonic motion?
E0 = 1/2mω2x0
E0 = 1/2mω2x02
E0 = 1/2mω2x0sin(ωt)
E0 = 1/2mω2x0x
What is the term used to describe the minimum damping that causes the oscillating system to return to its equilibrium position in the minimum time and without oscillating?
Damped oscillation
Heavy damping
Light damping
Critical damping
Which graph shows how kinetic energy and elastic potential energy change with time during simple harmonic motion?
Energy Vs Frequency
Energy Vs Displacement
Energy Vs Time
Energy Vs Velocity
What is the equation used to calculate the motion of a body undergoing Simple Harmonic Motion with three trigonometry equations describing displacement, velocity, and acceleration?
x(t)=Acos(ωt)
v(t)=− ωt sin(ωt)
a(t)=− ω2t cos(ωt)
x(t)=Acos(ωt)
v(t)=− ωt sin(ωt)
a(t)=− ω2t cos(ωt)
x(t)=Asin(ωt)
v(t)=ωA cos(ωt)
a(t)=− ω2Asin(ωt)
x(t)=Acos(ωt)
v(t)=− ωA cos(ωt)
a(t)=− ω2A sin(ωt)
What is capacitance?
The charge on the plates of the capacitor per unit P.d.
The resistance in a circuit
The voltage supplied to a capacitor
The current flowing through a capacitor
What is the formula for combined capacitance of capacitors in series?
V = QC
Ctotal = C1 + C2 + C3
Q = CV
C = Q / V
What is the effect of changing the resistance in the circuit when discharging a capacitor?
Increased charge flow
Increased voltage
Decreased time to discharge
Decreased current
What is the time constant of a circuit equal to?
RC
R + C
1/RC
C/R
What is the formula for exponential decay of charge on a capacitor?
I = I0 e^(t/RC)
V = V0 e^(-t/RC)
I = I0 e^(-t/RC)
Q = Q0 e^(-t/RC)
What happens when the capacitor discharges through a resistor?
Potential difference increases
Current remains constant
Voltage across the capacitor decreases
Charge flows off the capacitor
What is the formula for the energy stored in a capacitor?
V = QC
Q = CV
W = 1/2CV^2
W = 1/2QV
What is the formula for the charge stored on a capacitor?
Q = V / C
V = Q / C
C = Q / V
Q = CV
What is the force per unit mass defined as in a gravitational field?
Gravitational field strength
Acceleration
Velocity
Weight
What is the value of the gravitational field strength near the surface of the Earth?
0 N/kg
9.81 N/kg
0.75 N/kg
25 N/kg
What is the classic equation for weight in relation to gravitational field strength?
W = mv
W = ma
W = mg
W = mr
What is the value of the Universal gravitational constant G?
6.67 x 10^-11 Nm^2/kg^2
9.81 ms^-2
0.75 N/kg
25 N/kg
What is the force between two point masses according to Newton's law of gravitation?
F = Gm1m2 / r
F = mr
F = ma
F = mv
What is the gravitational potential at a point defined as?
Velocity of an object
Work done per unit mass in bringing a small test mass from infinity to the point
Acceleration due to gravity
Force per unit mass
What is the gravitational potential energy of two point masses given by?
EP = GMm / r
EP = ma
EP = mv
EP = mr
Why is the value of gravitational field strength roughly constant for small changes in height near the Earth's surface?
Due to the spherical shape of the Earth
Due to the inverse square law of gravity
Due to the presence of the Moon
Due to the rotation of the Earth
What is the equation for the gravitational field strength due to a point mass?
g = GM / r^2
g = G / r^2
g = M / r^2
g = Gm / r^2
What is the work done per unit mass in bringing a point mass from infinity defined as?
Gravitational constant
Gravitational potential energy
Gravitational field strength
Gravitational potential
What is the principle of an ultrasound?
Directing ultrasound waves into the body to obtain diagnostic information about internal structures
Producing radioisotopes
Injecting a tracer into a vein to produce an image
Using X-rays to image internal body structures
What is the purpose of a CAT scan?
To detect gamma rays during a PET scan
To generate ultrasound waves
To calculate the attenuation of X-rays in matter
To produce a 3D image of an internal structure by combining multiple X-ray images
What is the main factor causing attenuation of ultrasound waves?
Refraction
Scattering
Reflection
Absorption
How are gamma rays detected during a PET scan?
By applying a p.d. across a piezo-electric crystal
Using a crystal that scintillates and a photomultiplier
By rotating anode and vacuum
By using a piezoelectric transducer
What is the purpose of using gel on the patient during an ultrasound?
To prevent reflection of ultrasound waves at the skin
To increase the attenuation of ultrasound waves
To generate ultrasound waves
To match the impedance of the skin and reduce reflection
What is the specific acoustic impedance of a medium defined as?
Z = ρ, where ρ is the density of the medium
Z = ρc, where c is the speed of sound in the medium
Z = α, where α is the absorption coefficient
Z = c, where c is the speed of sound in the medium
What is the fraction of incident intensity of ultrasound that is reflected at the boundary between two materials?
𝐼𝑟/𝐼0=(𝑍1+𝑍2 )2/(𝑍1+𝑍2)2
𝐼𝑟/𝐼0=(𝑍1+𝑍2)2/(𝑍1−𝑍2)2
𝐼𝑟/𝐼0=(𝑍1−𝑍2)/(𝑍1+𝑍2)2
𝐼𝑟/𝐼0=(𝑍2−𝑍1)2/(𝑍2+𝑍1)2
What is the energy of the gamma-ray photons emitted during the annihilation of an electron-positron pair?
𝒇𝒎𝒂𝒙= 𝒆𝑽𝒉
𝑬𝒎𝒂𝒙=𝒉𝒇𝒎𝒂𝒙
𝑬𝒏𝒆𝒓𝒈𝒚 𝒐𝒇 𝒑𝒉𝒐𝒕𝒐𝒏=𝑬𝒄
𝑬𝒏𝒆𝒓𝒈𝒚 𝒐𝒇 𝒑𝒉𝒐𝒕𝒐𝒏=𝒉𝒇
What is the famous equation that represents the equivalence between energy and mass?
E = mc^2
E = 1/2 mv^2
F = ma
P = mv
What is the term used to describe the minimum external energy required to completely separate all the neutrons and protons of a nucleus to infinity?
Binding energy
Half-life
Mass defect
Decay constant
Which element is the most stable according to the graph showing binding energy per nucleon vs. number of nucleons?
Iron
Uranium
Carbon
Helium
What is the probability that an individual nucleus will decay per unit time interval called?
Decay constant
Binding energy
Activity
Half-life
What is the formula used to calculate the activity of a radioactive sample?
A = λN
A = ΔN/Δt
A = N0e^-λt
A = -λN
What is the time taken for half of the unstable nuclei to decay called?
Half-life
Nuclear time
Decay time
Stability time
Which formula represents the exponential nature of radioactive decay?
N = N0e^-λt
E = mc^2
R = R0e^-λt
A = λN
If a sample of uranium originally contained 109 radioisotopes and its decay constant is 4.9x10^-12s^-1, how many radioisotopes will be left after 3 billion years?
54
34
68
27
What did Einstein postulate light is composed of?
Atoms
Wave packets
Molecules
Particles
What is the formula for the energy of a photon?
E = QV
E = 1/2mv^2
E = mc^2
E = hf
What is the unit of energy equal to the work done when 1 electron is moved through a p.d. of 1V?
Ampere
Electronvolt
Watt
Joule
What is the formula for the momentum of a photon?
p = E / c
p = QV
p = mv
p = hf
What is the threshold frequency for the photoelectric effect?
Frequency at which emission is maximum
Frequency above which emission occurs
Frequency at which absorption occurs
Frequency below which emission does not occur
What did Louis De Broglie theorize about particles with mass?
They possess only particle properties
They are invisible
They possess wave properties
They are stationary
What is the wavelength associated with a moving particle according to de Broglie?
λ = QV
λ = E / c
λ = hf
λ = h / p
What can be used to determine the composition of distant stars?
Quantum physics
Emission and absorption line spectra
Photoelectric effect
Wave-particle duality
What is an electric field?
A region around a charged particle within which a force would be exerted only on neutral particles
A region around a charged particle within which no force is exerted on other charged particles
A region around a neutral particle within which a force would be exerted on other neutral particles
A region around a charged particle within which a force would be exerted on other charged particles
What is the formula for the force on a charge in an electric field?
F = EQ
F = E/q
F = qE
F = q/E
How is the electric field strength at a point defined?
Force per unit charge exerted on a stationary negative charge at that point
Force per unit charge exerted on a stationary positive charge at that point
Force per unit charge exerted on a stationary neutral charge at that point
Force per unit charge exerted on a moving positive charge at that point
What is the work done by the electric field to move a positive charge from one plate to another in a uniform field?
W = qV
W = qE
W = qVAB
W = qd
What type of motion does a charged particle exhibit in a uniform electric field when entering at right angles to the field lines?
Random motion
Parabolic motion
Linear motion
Circular motion
What is Coulomb's law used for?
Calculating the force between a charged particle and a neutral particle
Calculating the force between two neutral particles
Calculating the force between two charged particles in a conductor
Calculating the force between two point charges in free space
What is the formula for the electric field strength due to a point charge in free space?
E = Q / (8πε0r2)
E = Q / (πε0r2)
E = Q / (2πε0r2)
E = Q / (4πε0r2)
How is electric potential defined at a point?
The work done per unit positive charge in bringing a small test charge from infinity to the point
The force exerted per unit negative charge in bringing a small test charge from infinity to the point
The work done per unit negative charge in bringing a small test charge from infinity to the point
The force exerted per unit positive charge in bringing a small test charge from infinity to the point
What is transferred from a region of higher temperature to a region of lower temperature?
Electricity
Sound
Light
Heat
What happens when two systems in contact are at the same temperature?
Heat stops transferring
Heat transfers faster
Heat reverses direction
Heat increases
What is the lowest possible temperature known as?
Absolute Zero
Boiling Point
Room Temperature
Freezing Point
Which property can be used for the measurement of temperature?
Density of a liquid
Volume of a gas
All of the above
Resistance of a metal
What is the specific heat capacity of a substance?
Energy needed to boil the substance
Energy needed to change state
Energy needed to raise the temperature by 1Kg
Energy needed to freeze the substance
What is the internal energy of a system determined by?
Kinetic energy only
Potential energy only
Both kinetic and potential energies
Temperature only
What does the First Law of Thermodynamics state about heat energy?
It can be created
It can be destroyed
It can be transferred
It can be converted to light
What is the difference between heat and temperature?
Temperature is the average kinetic energy of particles
Heat is thermal energy transferred between systems
Temperature is measured in Joules
Heat is measured in Kelvin
What is luminosity in terms of a star?
Total power of radiation emitted by a star
Distance between stars
Surface temperature of a star
Mass of a star
What is the radiant flux intensity?
Distance between stars
Power passing through a surface per unit area
Temperature of a star
Brightness of a star
What is the purpose of standard candles in astronomy?
Study the composition of stars
Determine distances to galaxies
Measure the size of stars
Classify stars based on color
What is the relationship between luminosity and distance from a source?
Radiant flux decreases by a factor of 2 when distance is doubled
Radiant flux remains constant with distance
Radiant flux increases when distance is doubled
Radiant flux decreases by a factor of 4 when distance is doubled
What is the Stefan-Boltzmann law used for?
Calculate the distance between stars
Determine the color of a star
Measure the brightness of a star
Estimate the luminosity of a star based on its temperature and radius
What does redshift in the spectra of distant galaxies indicate?
Galaxies are moving away from us
Galaxies are rotating
Galaxies are moving towards us
Galaxies are stationary
What did Edwin Hubble discover about the movement of galaxies?
Galaxies do not move
Further galaxies move faster away from us
Closer galaxies move faster away from us
All galaxies move at the same speed
What is the Big Bang theory?
Model of creation of the universe from a hot and dense state
Model of a static universe
Model of a contracting universe
Model of a flat universe
What is the base unit for amount of substance in the SI system?
Mol
G
Kg
L
What is Avogadro's constant?
2.718
9.81
3.1416
6.022 x 10^23
What is the molarity of a substance if the number of atoms is 1.8069x10^24?
0.3 mol
0.5 mol
1 mol
2 mol
What is the molar mass of 1 molecule of oxygen (O2)?
0.016 kgmol-1
0.032 kgmol-1
0.064 kgmol-1
0.128 kgmol-1
According to Boyle's Law, what is constant for a fixed mass of gas at constant temperature?
Pressure x Volume
Volume
Pressure
Temperature
What is the new pressure if a gas with a volume of 3m3 at 20Nm-2 is reduced to 1.5m3?
10 Nm-2
20 Nm-2
40 Nm-2
30 Nm-2
According to Charles Law, what is directly proportional to the absolute temperature for a constant mass of gas at fixed pressure?
Volume
Pressure
Temperature
Molarity
What is the ideal gas equation that can be used for gases behaving ideally?
pV = 1/3Nm
pV = NkT
pV = NkT
pV = nRT
What is the root-mean-square speed (𝑐𝑟.𝑚.𝑠) defined as?
The average of the squares of the speeds of all the molecules in a gas
The speed of light
The speed of sound
The speed of a falling object
What is the relationship between the average translational kinetic energy of a molecule and the absolute temperature of a gas?
𝑲.𝑬.(𝒐𝒇𝒂 𝒎𝒐𝒍𝒆𝒄𝒖𝒍𝒆) = 3𝒌𝑻𝟐𝑵𝑨
𝑲.𝑬.(𝒐𝒇𝒂 𝒎𝒐𝒍𝒆𝒄𝒖𝒍𝒆) = 3/2TR/𝑵𝑨
𝑲.𝑬.(𝒐𝒇𝒂 𝒎𝒐𝒍𝒆𝒄𝒖𝒍𝒆) = 2/3𝒌𝑻
𝑲.𝑬.(𝒐𝒇𝒂 𝒎𝒐𝒍𝒆𝒄𝒖𝒍𝒆) = 3/2𝒌𝑻
What is a magnetic field?
A field of force produced by moving charges
A field of force produced by stationary charges
A field of force produced by light waves
A field of force produced by sound waves
How can a magnetic field be represented?
By numbers
By dots
By field lines
By arrows
What increases the magnetic field due to the current in a solenoid?
An aluminum core
A plastic core
A ferrous core
A copper core
What is the direction of a magnetic field produced by a current-carrying wire according to the right hand rule?
Thumb is the direction of force, fingers show the direction of current
Thumb is the direction of the field, fingers show the direction of current
Thumb is the direction of current, fingers show the direction of force
Thumb is the direction of current, fingers show the direction of the field
What is the direction of a magnetic field produced by a solenoid according to the right hand rule?
Thumb is the direction of the south pole, fingers show the direction of the current
Thumb is the direction of the current, fingers show the direction of the north pole
Thumb is the direction of north pole, fingers show the direction of the current
Thumb is the direction of the current, fingers show the direction of the south pole
What is the force experienced per unit length by a current carrying conductor placed at right angles to a magnetic field?
Magnetic flux
Electric flux
Electric field strength
Magnetic flux density
What is the Hall voltage directly proportional to?
Magnetic flux density B
Electric field strength E
Magnetic flux Φ
Electric flux Ψ
What is the direction of the force on a charge moving in a magnetic field according to the right hand rule?
Thumb is the direction of charge, fingers show the direction of magnetic field
Thumb is the direction of magnetic field, fingers show the direction of charge
Thumb is the direction of velocity, fingers show the direction of force
Thumb is the direction of force, fingers show the direction of velocity
What is Faraday's law of electromagnetic induction?
The magnitude of the induced e.m.f is directly proportional to the rate of change of magnetic flux linkage
The magnitude of the induced e.m.f is inversely proportional to the rate of change of magnetic flux linkage
The magnitude of the induced e.m.f is directly proportional to the magnetic flux density
The magnitude of the induced e.m.f is inversely proportional to the magnetic flux density
What does Lenz's law state about the direction of an induced e.m.f?
An induced e.m.f is in a direction so as to produce effects that oppose the change producing it
An induced e.m.f is in a direction so as to enhance the change producing it
An induced e.m.f is in a direction so as to have no effect on the change producing it
An induced e.m.f is in a direction so as to delay the change producing it
What is the r.m.s value of an alternating current?
That current which delivers the minimum power to a resistive load
That current which delivers the maximum power to a resistive load
That steady current which delivers the same average power as the A.C to a resistive load
That current which delivers no power to a resistive load
What is the purpose of a single diode in half-wave rectification?
To allow current flow in only one direction
To decrease the voltage
To increase the voltage
To allow current flow in both directions
What is the effect of a single capacitor in smoothing in rectification?
Maintains the voltage at a high level by discharging gradually
Decreases the voltage by discharging quickly
Has no effect on the voltage
Increases the voltage by charging quickly
What does a larger capacitor do in smoothing in rectification?
Charges more quickly
Discharges more slowly
Discharges more quickly
Charges more slowly
What does a larger resistor do in smoothing in rectification?
Causes a slower discharge of the capacitor
Has no effect on the discharge of the capacitor
Causes the capacitor to charge instead of discharge
Causes a quicker discharge of the capacitor
