Question # 1

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

Angular acceleration is produced by

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Power

Torque

Pressure

Force

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

A frame of reference stationed at the earth is an

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Inertial frame

None internal frame

Accelerated frame

Laboratory frame

In order to produce beats, the two sound waves should have.

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The same amplitude

Slightly different amplitude

The same frequency

slightly different frequencies.

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

Law of physics expressed in term of

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Base quantites

Derived quantities

a and b

None of these

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

A body of mass 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top

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400 J

490 J

49 J

98 J

For 2.450 no. of significant digits.

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2

1

3

4

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

The Branch of hysics wave mechanics introduced by

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einstein

De broglie

Max Planck

Bohar

The distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

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