PHYSICS COMPREHENSIVE
EXAMINATION QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. The SI unit of electric field is
A. volt
B. newton
C. coulomb
D. volt per meter
Answer: D
Rationale: Electric field is defined as force per unit charge or potential gradient,
giving units of V/m.
2. A particle moving in uniform circular motion has
A. zero acceleration
B. constant velocity
C. changing velocity direction
D. zero net force
Answer: C
Rationale: Even with constant speed, the velocity direction changes, implying
centripetal acceleration.
3. The work done by a centripetal force in circular motion is
A. positive
B. negative
, C. zero
D. maximum
Answer: C
Rationale: The force is always perpendicular to displacement, so no work is
done.
4. Which law explains the photoelectric effect?
A. Newton’s second law
B. Maxwell’s equations
C. Einstein’s photoelectric equation
D. Ohm’s law
Answer: C
Rationale: Einstein explained the effect using quantized photons and energy
conservation.
5. The uncertainty principle relates uncertainty in
A. mass and energy
B. position and momentum
C. charge and time
D. velocity and acceleration
Answer: B
Rationale: Heisenberg’s principle states Δx·Δp ≥ ħ/2.
6. In an ideal gas, internal energy depends only on
A. pressure
B. volume
C. temperature
D. density
Answer: C
Rationale: For an ideal gas, internal energy is purely a function of temperature.
7. The magnetic force on a moving charge is maximum when the velocity is
A. parallel to the field
, B. antiparallel to the field
C. perpendicular to the field
D. zero
Answer: C
Rationale: Magnetic force is qvB sinθ, maximized at θ = 90°.
8. A capacitor stores energy in the form of
A. kinetic energy
B. thermal energy
C. electric field energy
D. magnetic field energy
Answer: C
Rationale: Energy is stored in the electric field between the plates.
9. The escape velocity from Earth depends on
A. mass of the object
B. radius of Earth
C. atmospheric pressure
D. direction of launch
Answer: B
Rationale: Escape velocity depends on Earth’s mass and radius, not object mass.
10.Which particle has zero rest mass?
A. electron
B. proton
C. neutron
D. photon
Answer: D
Rationale: Photons are massless particles of electromagnetic radiation.
11.The SI unit of magnetic flux is
A. tesla
EXAMINATION QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. The SI unit of electric field is
A. volt
B. newton
C. coulomb
D. volt per meter
Answer: D
Rationale: Electric field is defined as force per unit charge or potential gradient,
giving units of V/m.
2. A particle moving in uniform circular motion has
A. zero acceleration
B. constant velocity
C. changing velocity direction
D. zero net force
Answer: C
Rationale: Even with constant speed, the velocity direction changes, implying
centripetal acceleration.
3. The work done by a centripetal force in circular motion is
A. positive
B. negative
, C. zero
D. maximum
Answer: C
Rationale: The force is always perpendicular to displacement, so no work is
done.
4. Which law explains the photoelectric effect?
A. Newton’s second law
B. Maxwell’s equations
C. Einstein’s photoelectric equation
D. Ohm’s law
Answer: C
Rationale: Einstein explained the effect using quantized photons and energy
conservation.
5. The uncertainty principle relates uncertainty in
A. mass and energy
B. position and momentum
C. charge and time
D. velocity and acceleration
Answer: B
Rationale: Heisenberg’s principle states Δx·Δp ≥ ħ/2.
6. In an ideal gas, internal energy depends only on
A. pressure
B. volume
C. temperature
D. density
Answer: C
Rationale: For an ideal gas, internal energy is purely a function of temperature.
7. The magnetic force on a moving charge is maximum when the velocity is
A. parallel to the field
, B. antiparallel to the field
C. perpendicular to the field
D. zero
Answer: C
Rationale: Magnetic force is qvB sinθ, maximized at θ = 90°.
8. A capacitor stores energy in the form of
A. kinetic energy
B. thermal energy
C. electric field energy
D. magnetic field energy
Answer: C
Rationale: Energy is stored in the electric field between the plates.
9. The escape velocity from Earth depends on
A. mass of the object
B. radius of Earth
C. atmospheric pressure
D. direction of launch
Answer: B
Rationale: Escape velocity depends on Earth’s mass and radius, not object mass.
10.Which particle has zero rest mass?
A. electron
B. proton
C. neutron
D. photon
Answer: D
Rationale: Photons are massless particles of electromagnetic radiation.
11.The SI unit of magnetic flux is
A. tesla
