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 Physics Questions

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Q:

Instrument for measuring work performed is called _________.

A) Eudiometer B) Anemometer
C) Hyetometer D) Ergometer
 
Answer & Explanation Answer: D) Ergometer

Explanation:
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Q:

What does it mean if a micrograph is false colored?

Answer

If a micrograph is false-colored, it means that the computer has created the colour for the object since we know that the electron microscopes sees only black and white colours.

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Q:

Which microscope is often used to view metal surfaces?

A) Optical microscopes B) Scanning tunneling microscopes
C) Electron microscopes D) None of the above
 
Answer & Explanation Answer: B) Scanning tunneling microscopes

Explanation:

Microscopes are of three types. They are :

 

1) Optical microscopes

 

2) Electron microscopes

 

3) Scanning tunneling microscopes

 

 Which_microscope_is_often_used_to_view_metal_surfaces1538720175.png image

 

Scanning tunneling microscopes are the microscopes that are used to view metal surfaces.

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Q:

Which measurement describes the pressure of a gas?

A) 450 mm Hg B) 315 K
C) 251 g/cub.cm D) None of the above
 
Answer & Explanation Answer: A) 450 mm Hg

Explanation:

450 mm Hg denotes the air pressure.

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Q:

Change in focal length of eye lens is caused by

A) ciliary muscles B) iris
C) pupil D) retina
 
Answer & Explanation Answer: A) ciliary muscles

Explanation:
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Q:

Rear view mirror of car is convex or concave?

A) Convex B) Concave
C) Both A & B D) Can't be determined
 
Answer & Explanation Answer: A) Convex

Explanation:

The side view mirror, in all the vehicles we use only convex mirror. This mirror makes the objects and small to show them in the mirror. That's why in all such mirrors, "Ojects in the mirror are closer than they appear."

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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:

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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