Question # 1

Which memory consists of integrated circuits?

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Primary memory

Audio cassette

Video cassette

Compact cassette

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

Which is not a hardware device?

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CPU

Windows

Keyboard

Mouse

LDR can act as:

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Diode

Switch

Transistor

Rectifier

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt

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

It mass of bob o a simple pendulum is doubled, its time period.

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is doubled

become four times

remains same

none of the above

How Galvanometer is connected in circuit to detect current:

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In series

In parallel

Fixed

Variable

The speed of sound in iron at 25°C is:

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5950 m/sec

5900 m/sec

6950 m/sec

6940 m/sec

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90^o is called:

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angle of incidence

critical angle

angle of refrection

None of these

When a potential of 10 volt is applied across a conductor, a current of 5 miliampere flows through it, the resistance of the conductor will be:

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200 ohm

2000 ohm

0.2 ohm

0.002 ohm

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

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Principal focus

Focal length

Aperture

Image

study of charges at rest is called:

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acoustics

electrostatics

electronics

electricity

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