Question # 1

The basic operations performed by a computer are.

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arithmetic operations

non arithmetic operations

logical operation

both a and c

The value of refractive index of water is:

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2.33

1.36

1.33

1.39

Which of the following reasons increase the importance of computer?

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Speedy

Long time storage of memory

Quick decision

All of these

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

The waves in which particles of the medium vibrate parallel to the direction of waves are called:

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Longitudinal waves

Transverse waves

Electromagnetic waves

Both a and c

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

1 KB =______________

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1022 bytes

1023 bytes

1024 bytes

1025 bytes

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power.

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remains unchanged

halves

doubles

four time

If focal length of a lens is 1m, then its power will be:

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1 D

0.5 D

1.5 D

1 D

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Positively charged

Either, a, b or c

Which combination forms NAND gate:

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AND & OR

AND & NOT

NOT & OR

NAND & NOT

When frequency of sound wave is increased, which of the following decreases?

i) Wavelength ii) Period iii) Amplitude

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i only

(iii) only

i and ii only

i and iii only

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