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

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The heating element of a heater is made of nichrome because it has

A. High resistivity, low melting point

B. High resistivity, high melting point

C. Low resistivity, high melting point

D. Low resistivity, low melting point

Answer: Option B

Solution (By JKSSB Mock Tests)

Nichrome high resistivity generates more heat, high melting point avoids melting at high temperature.

This question belongs to: Science Physics

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Question #1

The Nobel Prize in Physics 1901 was awarded to

A. Planck

B. Röntgen

C. Einstein

D. Curie

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Correct Answer: Option B

Explanation:
Wilhelm Röntgen for discovery of X-rays.

This question belongs to: Science Physics

Question #2

A 12 V battery with internal resistance 0.5 Ω delivers current 2 A. Terminal voltage is

A. 13 V

B. 11 V

C. 10 V

D. 12 V

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Correct Answer: Option B

Explanation:
V = E - Ir = 12 - 2×0.5 = 11 V.

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Question #3

A pump lifts 100 kg of water through 5 m in 2 s. Power (g=10) is

A. 500 W

B. 1000 W

C. 250 W

D. 2500 W

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Correct Answer: Option D

Explanation:
Work = 100×10×5=5000 J. Power = 5000/2 = 2500 W.

This question belongs to: Science Physics

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