Question # 1

Physics deals with the study of

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Matter

Energy

Both of them

Human Body

Tick the correct statement:

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Both the potential and potential difference is scalars

Potential is a scalar but potential difference is a vector

Both are vectors

Potential is vector but potential difference is scalar

None of these

The square of 0.4 is:

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Greater than 0.4

Smaller than 0.4

Equal to 0.4

None of them

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

In frequency modulation (FM), the carrier waves amplitude

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Remains constant

Increase

Decreases

None of these

The figure 1.007276μ shows the mass of an:

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Atom

Positron

Electron

Neutron

Proton

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

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deuteron

deterium

protium

tritium

The appearance of the colour in the soap (oil) film results from:

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Dispersion

Interference

Reflection

Refraction

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

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tiny regions

domains

vectors

none of them

In magnet-coil experiment, emf can be produced by:

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving the coil

Relative motion of the loop and magnet

Any one of above

All above

Polymeric solids have

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low specific gravity

high specific gravity

either of them

none of them

The light source in the transmitter can be either

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Light emitting diode

Semiconductor laser

Light emitting in an invisible infra red

All of these

In YDS experiment, if the distance between the slits and also the distance between slits and screen is doubled, the fringe width

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Becomes doubled

Becomes 4 times

Is halved

Remains the same

When θ = 0 in relation d sinθ = λ, the path difference between the rays coming out from the slits of the grating will be zero. So the image in this directions is

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Dark

Bright

Non image formed

None of these

The study of atomic structure of crystals by X-rays was initiated by W.H.. Bragg and W.L. Bragg in

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1920

1926

1910

1914

Reverse process of vector addition is called

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Negative of a vector

Subtraction of vector

Resolution of a vector

Multiplication of a vector

In which of the optical fibres, the propagation of light signal is through continuous refraction?

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multi-mode step index fibre

multi-mode graded index fibre

both of them

none of them

A passenger lift accelerates upwards. What change would a passenger inside the lift standing on a weighing machine notice in the weight shown on the machine?

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a decrease in the reading on the scale

no change in the reading on the scale

an increase in the reading on the scale

an increasing in the weight

The dimensions of torque are

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ML²T^-2

MLT²

MLT^-1

ML²T²

The relative permitivity ∈_r for transformer oil is

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2.9

3.0

2.1

2.4

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters,then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

Two charges are placed a certain distance apart in air. When a metallic sheet is placed between them the electric static force between them will

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Decrease

Increase

Remains unchanged

Become zero

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