Question # 1

Conventionally the angular velocity is directed to an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of the above

The magnifier forms a virtual image of the object at:

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Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

Second's pendulum is the pendulum whose time period is:

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1 second

2 second

3 second

None of these

If the waves produced in a microwave oven are of wave-length 12 cm, then their frequency will be:

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2500 MHz

0.25 MHz

2500 KHz

None of these

The number of vibrating body at any instant from its equilibrium position is called

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displacement

frequency

amplitude

time period

The induced emf in a coil is proportional to:

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Magnetic flux through a coil

Rate of change of magnetic flux through the coil

Area of the coil

Product of magnetic flux and area of the coil

Neutron was disvovered by:

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Rutherford in 1920

Chadwick in 1922

Bohr in 1913

Compton in 1927

None of these

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5μF

10μF

3μF

6μF

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

Back emf is produced due to

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Self induction

Mutual induction

A.C

Lenz's law

The drag force F on a sphere of radius 'r' moving slowly with speed V through a fluid of viscosity η by Stake's law

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F = πηra

F = 6πηrω

F = 6πηrV

F = 6πηraV

A wave which consists of a single, non-repetitive disturbance is called a

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Continuous wave

Longitudinal wave

Pulse

Transverse wave

The angular velocity of a particle rotating in a circular orbit 100 times per minute is

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1.66 rad/s

10.47 rad/s

10.47 deg/s

60 deg/s

A gravity free system, in which satellite moves due to

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The free fall acceleration

Radial accelerations

Gravitational acceleration

All of these

The dimensional formula for angular momentum is:

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(M°L²T^-2)

(ML²T^-1)

(MLT^-1)

(ML²T^-2)

Rectangular components of a vector are those which have angle between them

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30^o

60^o

90^o

0^o

A longitudinal sinusoidal wave has wavelength of 1cm and a period of 2sec. Its wavevelocity is:

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50 cm/ sec

0.5 cm/ sec

5 m/ s

0.005 m/ sec

Approximate power of a car moving at a speed of 90 kmh^-1 in watts

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1.1 × 10⁵

1.2 × 10⁶

1.3 × 10⁷

1.4 × 10⁸

A diffraction grating of length 2cm has 4000 lines The grating element is

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0.5 x 10^-2 cm

5 x 10⁴

5 x 10^-4

0.5 x 10^-4 cm

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tension

Modulus elasticity of any materiel is of the order of:

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10⁵

10²

10^-2

10^-5

10^-10

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