Magnetism and Electromagnetic Induction MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The magnetic flux density is measured in units of:
A. Tesla
B. Weber
C. Henry
D. Ohm
Answer: Tesla
The magnetic field inside a toroidal coil is:
A. Uniform and confined within the core
B. Concentrated outside the core
C. Zero inside
D. Zero outside
Answer: Uniform and confined within the core
The magnetic field produced by a moving charge is:
A. Circular and centered on the path of the charge
B. Linear and along the path of the charge
C. Radial and outward from the path of the charge
D. Concentric and inward toward the charge
Answer: Circular and centered on the path of the charge
The phenomenon of self-inductance is based on:
A. Faraday's Law of Induction
B. Lenz's Law
C. Ampere's Law
D. Maxwell's Equations
Answer: Faraday's Law of Induction
The magnetic flux through a surface is the product of:
A. Magnetic field strength and the area of the surface
B. Current and resistance
C. Electric field strength and the charge
D. Voltage and time
Answer: Magnetic field strength and the area of the surface
The phenomenon of electromagnetic induction is used in:
A. Transformers
B. Motors
C. Generators
D. All of the above
Answer: All of the above
The unit of magnetic permeability is:
A. Henry per meter
B. Tesla per meter
C. Weber per ampere
D. Ohm meter
Answer: Henry per meter
The magnetic flux through a closed surface is zero due to:
A. Gauss's Law for Magnetism
B. Faraday's Law of Induction
C. Ampere's Law
D. Lenz's Law
Answer: Gauss's Law for Magnetism
The magnetic field strength at the center of a current-carrying circular loop is:
A. B = μ0 I / (2R)
B. B = μ0 I R / 2
C. B = μ0 / (2πR)
D. B = I / (2μ0 R)
Answer: B = μ0 I / (2R)