NEET Physics: Magnetic Effects of Current and Magnetism — MCQ Test 3

Q6. Two parallel wires \( 0.04 \, \text{m} \) apart carry \( 10 \, \text{A} \) and \( 4 \, \text{A} \) in opposite directions. What is the force per unit length? (\( \mu_0 = 4 \pi \times 10^{-7} \, \text{T m/A} \))

Q7. A rectangular loop of area \( 0.08 \, \text{m}^2 \) with 10 turns carries \( 4 \, \text{A} \) in a field of \( 0.9 \, \text{T} \) perpendicular to the plane. What is the torque?

Q8. A circular coil of 60 turns and radius \( 8 \, \text{cm} \) carries a current of \( 0.9 \, \text{A} \). What is the magnetic field at its center? (\( \mu_0 = 4 \pi \times 10^{-7} \, \text{T m/A} \))

Q9. What is the primary source of the magnetic field in a solenoid?

Q10. A square loop of side \( 0.1 \, \text{m} \) with 25 turns carries \( 2 \, \text{A} \) in a magnetic field of \( 0.8 \, \text{T} \). The plane of the loop makes \( 30^\circ \) with the field. What is the torque?

NEET Physics — Magnetic Effects of Current and Magnetism

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A circular coil of radius 0.15 m0.15 \, \text{m} with 20 turns carries 2.8 A2.8 \, \text{A}. What is the magnetic field at the center? (μ0=4π×10−7 T m/A\mu_0 = 4 \pi \times 10^{-7} \, \text{T m/A})

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Magnetic Effects of Current and Magnetism. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

0
Easy
10
Medium
0
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Key concepts covered in this specific test include Circular, Magnetic, Solenoid, Parallel, Currents, and Direction.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1.

A circular coil of radius 0.15 m0.15 \, \text{m} with 20 turns carries 2.8 A2.8 \, \text{A}. What is the magnetic field at the center? (μ0=4π×10−7 T m/A\mu_0 = 4 \pi \times 10^{-7} \, \text{T m/A})

  • A.

    1.18 × 10⁻⁴ T

  • B.

    4.70 × 10⁻⁴ T

  • C.

    1.76 × 10⁻⁴ T

  • D.

    2.35 × 10⁻⁴ T

Q2.

A solenoid with 1750 turns per meter carries a current of 1.8 A1.8 \, \text{A}. What is the magnetic field inside it? (μ0=4π×10−7 T m/A\mu_0 = 4 \pi \times 10^{-7} \, \text{T m/A})

  • A.

    3.96 × 10⁻³ T

  • B.

    1.98 × 10⁻³ T

  • C.

    7.92 × 10⁻³ T

  • D.

    5.94 × 10⁻³ T

Q3.

Two parallel wires 0.05 m0.05 \, \text{m} apart carry currents of 8 A8 \, \text{A} and 3 A3 \, \text{A} in the same direction. What is the force per unit length between them? (μ0=4π×10−7 T m/A\mu_0 = 4 \pi \times 10^{-7} \, \text{T m/A})

  • A.

    4.8 × 10⁻⁶ N/m

  • B.

    9.6 × 10⁻⁶ N/m

  • C.

    1.92 × 10⁻⁵ N/m

  • D.

    7.2 × 10⁻⁶ N/m

Q4.

An electron moves at 6×106 m/s6 \times 10^6 \, \text{m/s} perpendicular to a field of 0.4 T0.4 \, \text{T} . What is the magnetic force? (Charge = 1.6×10−19 C1.6 \times 10^{-19} \, \text{C})

  • A.

    1.92 × 10⁻¹³ N

  • B.

    7.68 × 10⁻¹³ N

  • C.

    3.84 × 10⁻¹³ N

  • D.

    5.76 × 10⁻¹³ N

Q5.

A wire of length 1.3 m1.3 \, \text{m} carrying 6 A6 \, \text{A} is at 45∘45^\circ to a magnetic field of 0.8 T0.8 \, \text{T}. What is the force on the wire?

  • A.

    3.12 N

  • B.

    6.24 N

  • C.

    2.21 N

  • D.

    4.41 N

+ 5 more questions in the actual test

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