Question # 1

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

The diameter of spherical mirror is called:

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Curvature

Aperture

Sphere

Both a and b

The centre of spherical mirror is called:

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Focus

Axis

Centre

Pole

The converter of analogue to digital signal is:

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ADC

DAC

ATDC

None of these

Which is not a hardware device?

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CPU

Windows

Keyboard

Mouse

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

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4.8 W

14.5 W

30 W

60 W

The resistance of voltmeter is:

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zero

low

Very high

10Ω

The index of refraction depends on:

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The focal length

The speed of light

The image distance

The object distance

The substances which do not have free electrons are called:

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Insulators

Conductors

Semiconductors

None of these

the motion in which the friction reduces the mechanical energy of the system as time passes and the amplitude of motion reduces is called:

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SHM

Random motion

Damped motion

Circulatory motion

The parts of computer which can be seen and touched are called:

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Hardware

Software

Modem

CPU

A and B are the two inputs of a NOR gate. Its output would be 1 when:

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A = 1, B = 1

A = 0 , B = 1

A = 1, B = 0

A = 0 , B = 0

BASIC is a:

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High level language

Low level language

Assembly language

Machine Language

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