Magnetism and Electromagnetic Induction MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The force experienced by a current-carrying conductor in a magnetic field is given by the equation:
A. F = I × B × L
B. F = I × R
C. F = B × L
D. F = V × R
Answer: F = I × B × L
The self-inductance of a coil is given by the symbol:
A. L
B. R
C. C
D. M
Answer: L
The principle behind a moving coil meter is based on:
A. Electromagnetic induction
B. Electrostatic induction
C. Magnetic resonance
D. Capacitance
Answer: Electromagnetic induction
The magnetic field at the center of a current-carrying circular loop is directed:
A. Perpendicular to the plane of the loop
B. Parallel to the plane of the loop
C. Tangential to the loop
D. Radial from the center of the loop
Answer: Perpendicular to the plane of the loop
The rate of change of magnetic flux through a coil is directly proportional to the induced EMF according to:
A. Faraday's Law
B. Lenz's Law
C. Ampere's Law
D. Maxwell's Equations
Answer: Faraday's Law
The magnetic field inside a current-carrying solenoid is proportional to:
A. The current and the number of turns per unit length
B. The length of the solenoid
C. The temperature of the solenoid
D. The diameter of the solenoid
Answer: The current and the number of turns per unit length
The force on a charged particle moving in a magnetic field is given by:
A. F = qvB sin(θ)
B. F = qvB cos(θ)
C. F = qvB
D. F = qB
Answer: F = qvB sin(θ)
A transformer works on the principle of:
A. Electromagnetic induction
B. Magnetic resonance
C. Electrostatic induction
D. Magnetic polarization
Answer: Electromagnetic induction
The phenomenon where a changing magnetic field induces an electric field is described by:
A. Faraday's Law
B. Ampere's Law
C. Gauss's Law
D. Maxwell's Equations
Answer: Faraday's Law