The heating element of an electric heater is made of nichrome because it has MCQ with Answer and Explanation

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The heating element of an electric heater is made of nichrome because it has

A. High resistivity and high melting point

B. Low resistivity and high melting point

C. High resistivity and low melting point

D. Low resistivity and low melting point

Answer: Option A

Solution (By JKExamLibrary)

High resistivity for heat generation; high melting point to withstand high temperature without melting.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

A motor pump lifts 200 kg of water per minute to a height of 15 m. Power (g=10) is

A. 3000 W

B. 500 W

C. 2000 W

D. 1000 W

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Correct Answer: Option B

Explanation:
Work per minute = mgh = 200×10×15 = 30000 J. Power = 30000/60 = 500 W.

This question belongs to: Science Physics

Question #2 Report Error

The image formed on retina is

A. Virtual and erect

B. Virtual and inverted

C. Real and erect

D. Real and inverted

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Correct Answer: Option D

Explanation:
Real inverted image, brain interprets as erect.

This question belongs to: Science Physics

Question #3 Report Error

The force on a moving charge in a magnetic field is maximum when angle between velocity and field is

A. 45°

B. 90°

C. 180°

D. 0°

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Correct Answer: Option B

Explanation:
F = qvB sinθ, max at θ=90°.

This question belongs to: Science Physics

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