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WorksheetsMock PSPM SP025/1 Set 3
Total questions: 40
Worksheet time: 1hrs 1mins
The diagram above shows two negatively charged balloons
suspended from nonconducting strings being held by a student. What occurs as the student brings the balloons closer to each other without allowing them to touch?
The magnitude of the electrostatic force between the balloons increases, and they attract each other.
The magnitude of the electrostatic force between the balloons decreases, and they repel each other.
The magnitude of the electrostatic force between the balloons increases, and they repel each other.
The magnitude of the electrostatic force between the balloons decreases, and they attract each other.
A circuit is set up as shown in the diagram. The e.m.f. of the battery is 1.5 V and the resistance R is 2.0 Ω . Which statement below is not true about the circuit?
When switch S is opened, the voltmeter reads 1.5 V.
When switch S is closed, the voltmeter reads less than 1.5 V.
When switch S is closed, the ammeter reads 0.75 A.
When switch S is opened, the ammeter reads zero.
Kirchoff's second law states
in any closed loop in an electric circuit the algebraic sum of the electromotive forces in the loop is equal to the algebraic sum of the potential differences in that loop
in any closed loop in an electric circuit the vector sum of the electromotive forces in the loop is equal to the vector sum of the potential differences in that loop
in any closed loop in an electric circuit the algebraic sum of the currents in the loop is equal to the algebraic sum of the potential differences in that loop
none of these
What is the principle of potentiometer ?
V is proportional to L, when steady current flows through a wire of uniform area of cross section at constant temperature
deflection in G is proportional to current
resistance is inversely proportional to area of cross section
resistance is proportional to temperature
A charged particle is injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will ____:
move in a straight line
follow a spiral path
move along a parabolic path
move along a waveform
follow a circular path
1) A wire carries current I directed to the right as shown in the figure below. What is the direction of the magnetic field generated by the wire at point A?
To the right
To the left
Toward the wire
Into the page
A circular conducting loop is in a region of magnetic field B directed out of the page, as shown below. The magnitude of the magnetic field is decreasing. The direction of the induced current in the loop is
Clockwise
counterclockwise
Undefined because the current is zero
Impossible to determine without knowing the rate of change of field
Induction that occurs to the same conductor in which current changes is called ______.
mutual induction
multiple induction
selfish induction
self induction
When frequency decreases, capacitive reactance _____.
increases
decreases
remains the same
may increase or decrease
The power factor can be defined as the ratio of true power to _____.
apparent power
total resistance
total current
reactive power
In RLC circuit, If R is the resistance, XL is the inductive reactance and XC is the capacitive reactance, the impedance Z of the circuit is:
Which of the following statements about a series RCL circuit is true?
At resonance, the total reactance and total resistance are equal.
The impedance at resonance is purely inductive.
The current flowing in the circuit at resonance is at maximum.
The impedance at resonance is at maximum.
An image that is formed at the back of the mirror is said to be
real image
virtual image
inverted image
magnified image
What type of lens creates the image seen in the eyeglasses?
convex
concave
reflection
plane
Extra distance travelled by one of waves compared with other is called
path.
displacement.
phase difference.
path difference.
Two light sources are said to be coherent if they
are of the same frequency.
are of the same frequency, and maintain a constant phase difference.
are of the same amplitude, and maintain a constant phase difference.
are of the same frequency and amplitude.
What is the condition for destructive interference to occur for the soap film shown?
2nt = mλ
2nt = (m+¼)λ
2nt = (m+½)λ
2nt = (m+¾)λ
The energy of photoelectrons emitted from a metal surface can be increased by
using light of higher frequency.
using light of longer wavelength.
using light of higher intensity.
using monochromatic, polarized light.
How is a photon different from matter?
A photon has no mass and travels at the speed of light.
A photon has mass and travels at the speed of light.
A proton has no mass and travels at the speed of light.
A proton has mass and travels at the speed of light.
The threshold frequency is determined by:
Define binding energy
the energy required to break a nucleus into separate, non-interacting nucleons
the energy required to make a nucleus in a fusion reaction
the energy required to separate protons from neutrons
the energy required to separate the nucleons and electrons
Equation for activity
A = - λN
A = λN
A = - λ/N
A = λ/N
These are the category of hadrons that contain three quarks. This distinguishes them from mesons, which contain two (1 quark and 1 antiquark).
Gluons
Electrons
Leptons
Baryons
What is the standard model?
It explains how particles interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
It explains how atoms interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
It explains how nuclei interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
It explains how molecules interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
What is the job of the magnetic field in a cyclotron?
Create a force perpendicular to the motion of the particle, which acts a centripetal force
To accelerate the particle between the dees
To apply a force parallel to the direction of motion of the particle, which acts as the centripetal force.
So the direction of the force can be alternated every half turn
