The direction of force on a current-carrying conductor in a magnetic field is given by MCQ with Answer and Explanation

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The direction of force on a current-carrying conductor in a magnetic field is given by

A. Fleming's right hand rule

B. Fleming's left hand rule

C. Ampere's swimming rule

D. Right hand thumb rule

Answer: Option B

Solution (By JKExamLibrary)

Left hand rule for motor effect. Right hand rule for generator (induced current).

This question belongs to: Science Physics

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Question #1 Report Error

Which is the most penetrating radiation?

A. Alpha

B. Beta

C. X-rays

D. Gamma

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Correct Answer: Option D

Explanation:
Gamma rays highest penetration, alpha least.

This question belongs to: Science Physics

Question #2 Report Error

A 10 Ω resistor is connected across a 5 V battery. The current flowing is

A. 50 A

B. 0.5 A

C. 5 A

D. 2 A

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Correct Answer: Option B

Explanation:
I = V/R = 5/10 = 0.5 A. Ohm's law. Simple calculation. Power P = V×I = 2.5 W.

This question belongs to: Science Physics

Question #3 Report Error

The defect of vision in which the lens becomes opaque is called

A. Hypermetropia

B. Myopia

C. Cataract

D. Astigmatism

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Correct Answer: Option C

Explanation:
Cataract: clouding of lens, treated by surgery.

This question belongs to: Science Physics

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