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Learn electromagnetism practice test MCQs: value of magnetic field that will cause a max force of 7 × 10-3n on a 20 cm wire carrying current of 10 a will be, for free online courses with options 3.5 × 10-3 t, 1.5 × 10-3 t, 4.5 × 10-3 t, 2.5 × 10-3 t for online associates degree. Free skills assessment test is for online e-learning electromagnetism quiz questions for competitive assessment in physics major. Electromagnetism Video

MCQ: In a magnetic field of 2.50 × 10-3 T, if magnetic force is equal to proton's weight, then proton moves with speed of

1. 3.09 × 10-5 m s-1
2. 4.09 × 10-5 m s-1
3. 2.09 × 10-5 m s-1
4. 0.09 × 10-5 m s-1

B

MCQ: Value of magnetic field that will cause a max force of 7 × 10-3N on a 20 cm wire carrying current of 10 A will be

1. 3.5 × 10-3 T
2. 1.5 × 10-3 T
3. 4.5 × 10-3 T
4. 2.5 × 10-3 T

A

MCQ: Torque of couple is given by ILB × a, in which a is a/an

1. momentum
2. moment arm
3. arm
4. moment of inertia

B

MCQ: Product of force and moment arm is known as

1. potential difference
2. voltage
3. torque
4. inertia

C

MCQ: A power line 10 m high carries current 200 A, magnetic field will be

1. 2 × 106 T
2. 3 × 106 T
3. 4 × 106 T
4. 5 × 106 T

C