Magnetism and Electromagnetic Induction MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The magnetic field lines of a bar magnet emerge from:
A. The north pole and enter the south pole
B. The south pole and enter the north pole
C. The center of the magnet and move outward
D. The edges of the magnet
Answer: The north pole and enter the south pole
The term ‘magnetic permeability’ refers to:
A. The ability of a material to support the formation of a magnetic field within itself
B. The resistance of a material to magnetic fields
C. The capacity of a material to conduct electric current
D. The magnetic field strength in a material
Answer: The ability of a material to support the formation of a magnetic field within itself
The self-inductance of a coil increases with:
A. Increasing the number of turns of the coil
B. Increasing the temperature
C. Decreasing the core material
D. Increasing the applied voltage
Answer: Increasing the number of turns of the coil
The phenomenon of mutual induction occurs when:
A. A changing current in one coil induces an EMF in a nearby coil
B. A changing magnetic field induces an EMF in a single coil
C. A coil is placed in a static magnetic field
D. A coil is connected to a capacitor
Answer: A changing current in one coil induces an EMF in a nearby coil
The force on a charged particle moving in a magnetic field is maximized when:
A. The particle is moving perpendicular to the magnetic field
B. The particle is moving parallel to the magnetic field
C. The magnetic field is zero
D. The charge of the particle is zero
Answer: The particle is moving perpendicular to the magnetic field
The magnetic field inside a current-carrying solenoid is:
A. Uniform and parallel
B. Concentrated at the ends
C. Zero
D. Concentrated at the center
Answer: Uniform and parallel
The phenomenon where a changing magnetic field creates an electric field is known as:
A. Electromagnetic induction
B. Electrostatic induction
C. Magnetic resonance
D. Capacitive reactance
Answer: Electromagnetic induction
The direction of the magnetic field around a current-carrying conductor is given by:
A. The right-hand rule
B. The left-hand rule
C. Ampere's law
D. Faraday's law
Answer: The right-hand rule
The flux linkage in a coil is given by the formula:
A. Φ = B × A × N
B. Φ = B × A
C. Φ = B × N
D. Φ = A × N
Answer: Φ = B × A × N