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WorksheetsRSS Physics Quiz
Total questions: 50
Worksheet time: 25mins
The density of a substance is best defined as:
Mass per unit length
Mass per unit area
Mass per unit volume
Volume per unit mass
A body weighing 50 N on Earth is taken to the Moon, where the acceleration due to gravity is 1/6 that of Earth. Its weight on the Moon is:
300 N
50 N
8.3 N
300 N
The pressure exerted by a column of liquid depends on:
Density of liquid, height of column, acceleration due to gravity
Mass of liquid, speed of liquid, area of base
Volume of liquid, density of liquid, shape of container
Height of column, volume of liquid, temperature
When a stone is thrown vertically upwards, at the highest point:
Velocity = 0, acceleration = 0
Velocity = 0, acceleration = g (downwards)
Velocity = g, acceleration = 0
Velocity and acceleration are both upwards
The work done by a force of 20 N acting perpendicular to the displacement of 5 m is:
100 J
0 J
20 J
25 J
The principle of conservation of energy states that:
Energy can be created but not destroyed
Energy can be neither created nor destroyed, only transformed
Energy is always lost to the surroundings
Energy increases with time
Which of the following quantities is a vector?
Speed
Temperature
Displacement
Time
If the velocity of a wave is 300 m/s and its frequency is 150 Hz, the wavelength is:
0.5 m
2 m
45000 m
150 m
The time period of a simple pendulum depends on:
Mass of the bob and length of string
Length of string and acceleration due to gravity
Mass of the bob and acceleration due to gravity
Both mass and length
The electric current is defined as:
Rate of flow of electrons
Charge per unit time
Electric force per unit charge
Voltage divided by resistance
The SI unit of electric charge is:
Volt
Coulomb
Ampere
Ohm
Ohm’s law states that:
Voltage is proportional to current at constant temperature
Current is inversely proportional to voltage
Resistance is proportional to current
Power equals voltage times current
Which of the following is a scalar quantity?
Force
Velocity
Acceleration
Speed
The magnitude of acceleration due to gravity on the surface of the Earth depends on:
Latitude only
Altitude only
Both latitude and altitude
Neither latitude nor altitude
The phenomenon of a wave bending around an obstacle or opening is called:
Reflection
Refraction
Diffraction
Polarization
In an elastic collision:
Kinetic energy is lost
Momentum is not conserved
Total kinetic energy is conserved
Objects stick together after collision
The displacement-time graph for an object moving with uniform velocity is:
A curve
A horizontal line
A straight line through origin with positive slope
A straight line through origin with zero slope
A projectile is fired horizontally with initial velocity v₀ from height h. Ignore air resistance. The time of flight depends on:
Initial velocity v₀ only
Height h only
Both v₀ and h
Neither v₀ nor h
The source of all electromagnetic waves in a vacuum is:
Moving charges
Magnetic monopoles
Energy loss from atoms
Vibrations in magnetic fields
A resistance of 12 Ω is connected in series with a 6 Ω resistor across a 6 V battery. The current in the circuit is:
0.33 A
0.5 A
1 A
1.5 A
The work function of a metal is defined as:
Minimum energy needed to remove an electron from the metal surface
Maximum energy of incident photon
Energy released when electron is captured by metal
Total kinetic energy of emitted electrons
The efficiency of a machine is defined as:
Useful energy output divided by total energy input × 100%
Total energy input divided by useful output × 100%
Work output minus work input
Power input divided by power output
The acceleration of an object is zero when:
Velocity is zero
Velocity is constant
Velocity is increasing
Velocity is decreasing
Which quantity increases the resistance of a metallic conductor?
Increase in temperature
Decrease in temperature
Decrease in length
Increase in cross-sectional area
When a stone is dropped from height h, its velocity just before hitting the ground is:
√(2gh)
2gh
√(gh/2)
gh
The SI unit of power is:
Joule
Watt
Newton
Volt
The pressure at the bottom of a liquid column is proportional to:
Height of the column
Density of the liquid
Acceleration due to gravity
All of the above
The center of mass of a uniform rod lies:
At one end
At the midpoint
At one third from one end
Depends on length
For an object moving in a circle of radius r with speed v, its centripetal acceleration a is:
v/r
v²/r
r/v
r/v²
A light ray passes from air into water. Which of the following is true?
Speed increases, wavelength increases
Speed decreases, wavelength decreases
Speed increases, wavelength decreases
Speed decreases, frequency changes
Which one of the following quantities is conserved in all types of collisions?
Kinetic energy
Momentum
Velocity
Temperature
The photoelectric effect demonstrates the particle nature of:
Electrons
Photons
Protons
Neutrons
Ohm's law is not obeyed by:
Metallic conductors
Semiconductors
Superconductors
Electrolytes
The angle of incidence is equal to the angle of reflection according to:
Snell’s Law
Law of Reflection
Law of Refraction
Lenz’s Law
The unit of electric potential difference (voltage) is:
Ohm
Volt
Ampere
Coulomb
The displacement of a particle executing simple harmonic motion is given by x = A sin (ωt + φ). The maximum velocity is:
Aω
ω/A
A/ω
Aω²
In the case of terminal velocity, the acceleration of the object is:
Maximum
Zero
Constant and positive
Constant and negative
The work done against gravity to lift a mass m through height h is:
mgh
mgh/2
mg/h
m/g × h
The fundamental unit of current in SI is:
Ampere
Coulomb
Ohm
Watt
Which of the following makes the drift velocity of electrons in a wire increase?
Decrease in temperature
Increase in resistance
Decrease in voltage
Increase in cross-sectional area
The rate of change of momentum is equal to:
Force
Work
Energy
Power
A capacitor stores:
Charge only
Energy only
Charge and energy
Current and voltage
The phenomenon responsible for the change in direction of a wave when it passes from one medium to another is called:
Reflection
Refraction
Diffraction
Dispersion
The speed of sound is greatest in:
Solids
Liquids
Gases
Vacuum
The law of conservation of momentum implies that:
Total momentum before collision equals total momentum after collision
Momentum is always constant for any system
Momentum depends on velocity only
Momentum is equal to kinetic energy
The minimum speed required for a body to escape from the gravitational field of a planet is called:
Terminal velocity
Escape velocity
Critical velocity
Orbital velocity
When light passes from a denser medium to a rarer medium, the:
Frequency changes
Velocity decreases
Wavelength increases
Velocity increases
The velocity of a freely falling object after time t is given by:
v = gt
v = g/t
v = 2gt
v = g + t
The buoyant force on an object immersed in a fluid is equal to:
Weight of the fluid displaced
Weight of the object
Mass of the object times gravity
Mass of the fluid displaced
The force that opposes relative motion between two surfaces in contact is called:
Tension
Friction
Gravity
Normal reaction
