Physics Questions

Q:

Hot springs are heated geothermally by underlying

A) water B) magma
C) mitula D) None of the above
 
Answer & Explanation Answer: B) magma

Explanation:

Magma is molten rocks beneath the earth's crust. Hot springs are heated geothermally by underlying magma.

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Q:

The strength of an electromagnet can be increased by

A) increasing the length of the coiled wire B) increasing current supply
C) increasing the number of turns D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The strength of an electromagnet can be increased by increasing the cross-sectional area, increasing the number of turns, increasing current supply, increasing the length of the coiled wire.

 

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Q:

What are the two kinds of Rotatory motion?

A) Spin and Vibrational motion B) Spin and Projectile motion
C) Spin and Orbital motion D) Spin and Translatory motion
 
Answer & Explanation Answer: C) Spin and Orbital motion

Explanation:
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Q:

Which of these instruments is used to measure the wind speed?

A) Anemometer B) Inclinometer
C) Fathometer D) Calorimeter
 
Answer & Explanation Answer: A) Anemometer

Explanation:

Anemometer is the instrument that is used for measuring the speed of wind or any gas currents.

Which_of_these_instruments_is_used_to_measure_the_wind_speed1560165843.jpg image

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Q:

When a barometer is rising air pressure is

A) increasing B) decreasing
C) constant D) zero
 
Answer & Explanation Answer: A) increasing

Explanation:

The device which is used to measure air pressure is called as barometer. If the barometer reading is rising, it indicates that the air pressure is increasing and if the reading is falling the air pressure is decreaing.

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Q:

Speed regulation of synchronous motor is

A) 1% B) 25%
C) Zero D) 0.5%
 
Answer & Explanation Answer: C) Zero

Explanation:

speed_regulation_of_synchronous_motor1553077296.jpg image

Synchronous motor is a motor which runs at a constant speed irrespective of load attached to it. So the speed regulation of synchronous motor is ZERO.

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Q:

Acceleration is the rate of change of

A) Speed B) Velocity
C) Jerk D) Jounce
 
Answer & Explanation Answer: B) Velocity

Explanation:

The rate of change of velocity is called as Acceleration.

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Q:

Which waves cannot be transmitted through vacuum?

A) Electromagnetic B) Light
C) Sound D) Heat
 
Answer & Explanation Answer: C) Sound

Explanation:

Sound waves cannot be transmitted through vacuum. 

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