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Magnetic Effects of Current
NEET Physics • 10 questions • Free on ExamBattle
Practice Questions
Q1
The Biot-Savart law gives the magnetic field due to a current element. The field is proportional to:
- A. I·dl/r
- B. I·dl·sin(θ)/r²
- C. I/r²
- D. I·dl·r²
Q2
Ampere's circuital law states that ∮B·dl equals:
- A. μ₀I
- B. ε₀E
- C. μ₀I/r
- D. B·A
Q3
The force on a current-carrying conductor in a magnetic field is given by:
- A. F = qvB sinθ
- B. F = BIL sinθ
- C. F = B²IL
- D. F = IL/B
Q4
A moving coil galvanometer measures:
- A. Voltage directly
- B. Small direct currents
- C. Resistance only
- D. AC currents
Q5
The magnetic field inside a long solenoid of n turns per unit length and current I is:
- A. μ₀nI/2
- B. μ₀nI
- C. 2μ₀nI
- D. μ₀I/n
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