Sawaal
5
Q:

Among various electrical safety devices, one based on the heating effect of electric current is called a:

 

A) Capacitor B) Fuse
C) Protective relay D) Surge protector

Answer:   B) Fuse



Explanation:
Subject: Physics
Exam Prep: Bank Exams
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The waves used in radar systems are _______ waves.

 

A) ultraviolet B) infrared
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Answer & Explanation Answer: D) radio

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The audible range of sound for an average adult human being is ______.

 

A) 2 Hz - 20000 Hz B) 2 Hz - 2000 Hz
C) 20 Hz - 2000 Hz D) 20 Hz - 20000 Hz
 
Answer & Explanation Answer: D) 20 Hz - 20000 Hz

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Which of the following is the SI unit of temperature ?

 

A) Kelvin B) Réaumur scale
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Answer & Explanation Answer: A) Kelvin

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The lens-type commonly used for correcting presbyoPia is .........

 

A) concave lens B) convex lens
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Answer & Explanation Answer: C) bifocal lens

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Ultrasonic sounds are the sounds that have frequencies?

 

A) higher than 40 kHz B) higher than 50 kHz
C) higher than 20 kHz D) higher than 30 kHz
 
Answer & Explanation Answer: C) higher than 20 kHz

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Q:

The Earth is nearest to the Sun on:

 

A) 4 July B) 23 September
C) 21 March D) 3 January
 
Answer & Explanation Answer: D) 3 January

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The lowest temperature is recorded by:

 

A) Mercurial Thermometer B) Alcohol thermometer
C) Maximum reading thermometer D) Minimum reading thermometer
 
Answer & Explanation Answer: B) Alcohol thermometer

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The resistance of an ideal voltmeter is;

 

A) infinite B) zero
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Answer & Explanation Answer: A) infinite

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