Magnetism and Electromagnetic Induction MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The magnetic field due to a moving charge is given by:
A. Biot-Savart Law
B. Faraday's Law
C. Ampere's Law
D. Gauss's Law
Answer: Biot-Savart Law
The induced EMF in a coil is directly proportional to:
A. The rate of change of magnetic flux
B. The strength of the magnetic field
C. The area of the coil
D. The resistance of the coil
Answer: The rate of change of magnetic flux
The magnetic field produced by a solenoid is:
A. Uniform inside and concentrated outside
B. Concentrated inside and uniform outside
C. Uniform everywhere
D. Zero everywhere
Answer: Uniform inside and concentrated outside
The unit of magnetic flux is equivalent to:
A. Volt-second
B. Ampere-meter
C. Newton-meter
D. Joule
Answer: Volt-second
The magnetic field due to a bar magnet is:
A. Stronger at the poles
B. Stronger at the center
C. Uniform everywhere
D. Zero at the poles
Answer: Stronger at the poles
The phenomenon of induced EMF in a coil is described by:
A. Faraday's Law of Electromagnetic Induction
B. Lenz's Law
C. Ampere's Law
D. Maxwell's Equations
Answer: Faraday's Law of Electromagnetic Induction
The magnetic force on a current-carrying wire in a magnetic field is maximum when:
A. The wire is perpendicular to the magnetic field
B. The wire is parallel to the magnetic field
C. The wire is at 45 degrees to the magnetic field
D. The magnetic field is zero
Answer: The wire is perpendicular to the magnetic field
The magnetic field at a point due to a magnetic dipole is:
A. Stronger along the axis of the dipole
B. Stronger perpendicular to the axis of the dipole
C. Zero along the axis of the dipole
D. Zero perpendicular to the axis of the dipole
Answer: Stronger along the axis of the dipole
The magnetic field lines inside a magnet:
A. Run from the south pole to the north pole
B. Run from the north pole to the south pole
C. Are circular
D. Are parallel and equidistant
Answer: Run from the south pole to the north pole