Magnetism and Electromagnetic Induction MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The mutual inductance between two coils is a measure of:
A. The ability of one coil to induce EMF in another
B. The resistance of the coils
C. The magnetic field strength
D. The energy stored in the coils
Answer: The ability of one coil to induce EMF in another
The phenomenon of electromagnetic induction is utilized in:
A. Electric generators
B. Induction motors
C. Transformers
D. All of the above
Answer: All of the above
The phenomenon of magnetic hysteresis is observed in:
A. Ferromagnetic materials
B. Diamagnetic materials
C. Paramagnetic materials
D. Superconductors
Answer: Ferromagnetic materials
The induced EMF in a coil due to a changing magnetic field is given by:
A. ε = -dΦ/dt
B. ε = B × A
C. ε = I × R
D. ε = V × t
Answer: ε = -dΦ/dt
The inductance of a coil is affected by:
A. The number of turns and the core material
B. The length of the coil
C. The diameter of the coil
D. The temperature
Answer: The number of turns and the core material
The phenomenon where an alternating magnetic field induces an electromotive force in a nearby coil is known as:
A. Electromagnetic induction
B. Magnetic resonance
C. Faraday's effect
D. Lorentz force
Answer: Electromagnetic induction
The magnetic field strength inside a toroidal coil is:
A. Uniform and confined within the core
B. Concentrated outside
C. Zero inside
D. Zero outside
Answer: Uniform and confined within the core
The magnetic flux density is measured in:
A. Tesla
B. Weber
C. Henry
D. Ohm
Answer: Tesla
The self-inductance of a coil is affected by:
A. The number of turns and the core material
B. The current flowing through the coil
C. The length of the coil
D. The resistance of the coil
Answer: The number of turns and the core material