Physics Questions

Q:

Which instrument is used for measuring humidity of atmosphere?

A) Barometer B) Anemometer
C) Thermometer D) Hygrometer
 
Answer & Explanation Answer: D) Hygrometer

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Q:

What is the power rating (in W) of a bulb if a current of 0.3 A passes through on application of 240 V of potential difference across its terminals?

A) 800 B) 36
C) 400 D) 72
 
Answer & Explanation Answer: D) 72

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Q:

___________________ is defined as the force acting per unit current per unit length on a wire placed at right angles to the magnetic field.

A) Magnetic susceptibility B) Magnetic flux density
C) Magnetic flux D) Magnetic pulse
 
Answer & Explanation Answer: B) Magnetic flux density

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Q:

Which rays cause skin damage?

A) X­-Rays B) UV Rays
C) Infra red rays D) Yellow Rays
 
Answer & Explanation Answer: B) UV Rays

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Q:

Propagation of sound can be visualised as propagation of ____________ variations in the medium

A) elasticity B) viscosity
C) density D) porosity
 
Answer & Explanation Answer: C) density

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Q:

If an object moves in a circular path with uniform ________, its motion is called uniform circular motion.

A) speed B) Time
C) Velocity D) Acceleration
 
Answer & Explanation Answer: A) speed

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Q:

Which of the following has low resistivity?

A) Nichrome B) Glass
C) Ebonite D) Diamond
 
Answer & Explanation Answer: A) Nichrome

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Q:

Two vectors are said to be equal if

A) only their magnitudes are same B) only their directions are same
C) both magnitude and direction are same D) magnitudes are same but directions are opposite
 
Answer & Explanation Answer: C) both magnitude and direction are same

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