Question # 1

Wien's constant is measured in:

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Metre per kelviin

Metre kelvin

Kelvin per meter

Joules

Dynes

Bodies which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

The three equation of motions are useful only for

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linear motion with increasing acceleration

line motion with uniform acceleration

linear motion with zero acceleration

linear motion with varying acceleration

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms^-1then velocity at second cross-section is

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5000 cms^-1

500 cms^-1

50 cms^-1

0.5 cm/s

Addition of 2.189 kg, 0.089 kg, 11.8 kg, and 5.32 kg gives the rounded off answer as:

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19.398

19.400

19.4

19.3

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:

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Starts increasing

Starts decreasing

Becomes constant

Is called escape velocity

A particle having mass and charge equal to that of an electron is called:

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Proton

Positron

Pion

Pi-meson

Both (C) and (D)

The distance covered by the wave during one period is called its:

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Wave number

Frequency

Wavelength

Time period

Fidelity refers to

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Reproduction of original sound

Reproduction of original image

Reproduction of music

Reproduction of a CD from original copy

To display a digit of EIGHT, the number of ON LED'S are:

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Two

Three

Five

Seven

Eight

The drag force increases as the speed of the object

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Decreases

Increases

Decreases rapidly

None of these

The magnetism produced by electrons within an atom is due to

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Spin motion

Orbital motion

Spin and orbital motion

None of these

If the distance between two masses is doubled, the gravitational attraction between them

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Is doubled

Becomes four times

Is reduced to half

Is reduced to a quarter

Young's modulus for water is

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0

2

5

9

Whenever a body moves from one position to another, the change in its position is called

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Motion

Displacement

Distance

None of these

In case of streamed lined flow of liquid.the loss of energy is

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Maximum

Minimum

Infinite

Equal to what is in turbulent flow

A ball is thrown with a speed of 30 ms^-1in a direction 30° with the ground. What is its vertical height?

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115 m

1.15 m

11.5 m

0.115 m

The conductivities of conductors (metals) have

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10⁵ (Ω)^-1

10⁷ (Ωm)^-1

10⁸ (Ωm)^-1

10⁹ (Ωm)^-1

The physical sciences deals with

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Living things

Non-living things

Both

None of these

The SI unit of heat is

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calorie

joule

electron volt

None of these

The numerical values of the ratio of displacement to the distance is

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Always less than one

Always equal to one

Always more than one

Equal to or less than one

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