Question # 1

A digital system deals with quantities or variables which have

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only one state

only two discrete states

three discrete states

four discrete states

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none of them

What are the SI base units of the coefficient of viscosity

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Kg m s^-2

kgm² s^-2

Kg m s^-1

kg m^-1s^-1

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

A railway engine (mass 10⁴kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is

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3,600 N

7,200 N

10,000 N

100,000 N

Tick the correct answer:

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Torque is a vector quantity

Torque is the turning effect of a force

Torque is called moment of a force

All of above

Resistance of a conductor depends upon

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the quantity of current passing through it

the voltage applied between its end

its dimensions, physical state and nature of its material

all of the above

The earliest heat engine was

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petrol engine

diesel engine

electric engine

steam engine

The holes created in the L and M shells are occupied by transitions of:

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Electrons from lower states

Electrons from higher state

Positrons from higher states

Electrons from K shell

Both (A) and (B)

The maximum wavelength of a transverse wave that can be set up in a string of length Lis

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L

2L

V

4L

The fundamental unit of the quantity of matter is

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Kg

Mol

Gm

Meter

SI Unit of power is

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Joule

Pound

Watt

Dyne

The magnifying power of an instrument is expressed in

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Radians

Degrees

No units

None of these

Moment of inertia of a sphere is

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1/3 mr²

3/4 mr²

4/5 mr²

2/5 mr²

1 cal = __________

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11.184Joule

2.184Joule

3.184Joule

4.184Joule

Which of the following frequency ranges includes most of the electromagnetic waves emitted by the ultra - violet tubes used in a sun bed?

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5 x 10⁵ to 5 x 10⁸ Hz

5 x 10⁸ to 5 x 10¹¹ Hz

5 x 10¹¹ to 5 x 10¹⁴ Hz

5 x 10¹⁴ to 5 x 10¹⁷ Hz

Optic fibers are related with

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Communication

Light

Computer

None of these

The ratio of kinetic energy to potential energy for solids is

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Steam engine is:

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An optical system

A thermal system

A thermodynamic system

None of these

Force of friction between different layers in present in

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Gases

Solids

Liquids

Both A and C

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