AP POLYCET PHYSICS Multiple Choice Questions (MCQs)

AP POLYCET Physics - Electromagnetism MCQs

Questions 121 to 135

121. Which of the following is the SI unit of magnetic flux?
     A) Ampere
     B) Tesla
     C) Weber
     D) Coulomb
     Answer: C) Weber
122. What is the direction of the magnetic field around a current-carrying conductor?
     A) Along the length of the conductor
     B) Perpendicular to the conductor
     C) Circular around the conductor
     D) Radial inward
     Answer: C) Circular around the conductor
123. The force on a charged particle moving through a magnetic field is maximum when the angle between the velocity and magnetic field is:
     A) 0°
     B) 45°
     C) 90°
     D) 180°
     Answer: C) 90°
124. What is the magnetic field due to a current-carrying solenoid?
     A) Zero
     B) Non-uniform
     C) Uniform and strong
     D) Uniform and weak
     Answer: C) Uniform and strong
125. Which of the following is used to measure the magnetic field strength?
     A) Voltmeter
     B) Ammeter
     C) Galvanometer
     D) Magnetometer
     Answer: D) Magnetometer
126. The force between two parallel current-carrying wires is:
     A) Zero
     B) Inversely proportional to the distance between them
     C) Directly proportional to the square of the distance
     D) Directly proportional to the distance between them
     Answer: B) Inversely proportional to the distance between them
127. The magnetic field at the center of a circular loop carrying current is:
     A) Zero
     B) Maximum
     C) Minimum
     D) Constant
     Answer: B) Maximum
128. What is the formula for the magnetic force on a moving charged particle?
     A) F = qvB
     B) F = qv/B
     C) F = q/Bv
     D) F = qB/v
     Answer: A) F = qvB
129. Which law states that a current produces a magnetic field around it?
     A) Ohm’s Law
     B) Ampere’s Law
     C) Faraday’s Law
     D) Coulomb’s Law
     Answer: B) Ampere’s Law
130. What is the force on a current-carrying wire in a magnetic field proportional to?
     A) Magnetic field strength
     B) Length of the wire
     C) Current flowing through the wire
     D) All of the above
     Answer: D) All of the above
131. What happens when a conductor moves through a magnetic field?
     A) Electric field is produced
     B) No effect
     C) Magnetic field disappears
     D) Resistance increases
     Answer: A) Electric field is produced
132. In the phenomenon of electromagnetic induction, the induced emf is proportional to:
     A) Rate of change of magnetic field
     B) Area of the coil
     C) Speed of rotation
     D) Voltage
     Answer: A) Rate of change of magnetic field
133. Which of the following devices works on the principle of electromagnetic induction?
     A) Electric bulb
     B) Transformer
     C) Battery
     D) Electric heater
     Answer: B) Transformer
134. The direction of induced current in a conductor is given by:
     A) Lenz’s Law
     B) Ohm’s Law
     C) Ampere’s Law
     D) Faraday’s Law
     Answer: A) Lenz’s Law
135. What is the primary use of a galvanometer in a circuit?
     A) Measure the electric current
     B) Measure the potential difference
     C) Measure the resistance
     D) Measure the magnetic field
     Answer: A) Measure the electric current

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