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The force experienced by a current-carrying conductor in a magnetic field is given by:
A. F = B I L sinθ
B. F = B I L cosθ
C. F = B I / L
D. F = I / (B L)
Answer: F = B I L sinθ
The magnetic field due to a solenoid is:
A. Uniform inside and concentrated outside
B. Concentrated outside and zero inside
C. Zero everywhere
D. Uniform throughout
Answer: Uniform inside and concentrated outside
The magnetic field strength at the center of a current-carrying 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)
The magnetic field lines inside a magnet are:
A. From the south pole to the north pole
B. From the north pole to the south pole
C. Radial outward from the north pole
D. Radial inward to the south pole
Answer: From the south pole to the north pole
The magnetic field due to a current-carrying wire follows:
A. The right-hand rule
B. The left-hand rule
C. Ampere's Law
D. Faraday's Law
Answer: The right-hand rule
The energy stored in an inductor is given by:
A. 1/2 L I^2
B. 1/2 C V^2
C. 1/2 m v^2
D. L I
Answer: 1/2 L I^2
The magnetic field strength inside a solenoid is:
A. Proportional to the product of the number of turns and the current
B. Inversely proportional to the length of the solenoid
C. Proportional to the length of the solenoid
D. Zero outside the solenoid
Answer: Proportional to the product of the number of turns and the current
The magnetic flux through a surface is zero when:
A. The magnetic field is perpendicular to the surface
B. The surface area is zero
C. The magnetic field is parallel to the surface
D. The magnetic field strength is zero
Answer: The magnetic field is parallel to the surface
The mutual inductance between two coils depends on:
A. The distance between the coils and the number of turns
B. The resistance of the coils
C. The temperature
D. The voltage across the coils
Answer: The distance between the coils and the number of turns