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Q:

Two categories of laser printers are

Answer

There are two types of printers we use. They are 


* Laser Printers and


* Inkjet Printers.


 


And again Laser printers are of two categories. They are ::


 


1. Personal laser printers  and


2. Office laser printers.

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Q:

The reverse effect of X-ray emission is

A) Raman effect B) Compton effect
C) Zeeman effect D) Photo-electric effect
 
Answer & Explanation Answer: D) Photo-electric effect

Explanation:
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Q:

The term photon refers to

A) light ray B) sub atomic particle
C) radiation D) None of the above
 
Answer & Explanation Answer: B) sub atomic particle

Explanation:

The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force. The photon has zero rest mass and always moves at the speed of light within a vacuum.

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Q:

Which of these is true of all simple machines?

A) these make work easier B) work input > work output
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:
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Q:

Every hot object emits _________________

A) X -­ rays B) Visible light
C) Infrared rays D) Ultraviolet rays
 
Answer & Explanation Answer: C) Infrared rays

Explanation:
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Q:

Which among the following is not a unit of distance?

A) Light year B) Longsec
C) Astronomical unit D) Parsec
 
Answer & Explanation Answer: B) Longsec

Explanation:
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Q:

Which among the following temperature scale is based upon absolute zero?

A) Rankine B) Celsius
C) Fahrenheit D) Kelvin
 
Answer & Explanation Answer: D) Kelvin

Explanation:

Kelvin temperature scale is the temperature scale that is based upon absolute zero.

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Q:

Instrument for measuring light intensity is called

A) Lucimeter B) Cryometer
C) Cyanometer D) Barometer
 
Answer & Explanation Answer: A) Lucimeter

Explanation:
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