Question # 1

Bernoulli's equation is based upon law of conservation

Choose an answer

Mass

Momentum

Energy

None of these

A p-n junction has a thickness of the order of:

Choose an answer

1 cm

1 mm

10^-6cm

10^-12cm

The half-life of a radio-isotope is 5 years. The fraction of atoms decayed in this substance after 15 years will be

Choose an answer

1

3/4

7/8

5/8

The frequency of the incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

Choose an answer

Double the earlier value

Unchanged

More than doubled

Less than doubled

In which case application of angular velocity is useful?

Choose an answer

When a body is rotating

When velocity of body is in a straight line

When velocity is in a straight line

None of these

The initial velocity of a body moving along a straight line in 7 m/s. It has a uniform acceleration of 4 m/s². The distance covered by the body in the 5th second of its motion is

Choose an answer

25 m

35 m

50 m

85 m

According to Stoke's law, drag force depends on

Choose an answer

Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

A cable that can support a load W is cut into two equal parts. The maximum load that can be supported by either part is:

Choose an answer

W/4

W/2

W

2W

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

Choose an answer

Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

A wire of radius r has resistance R, It it is stretched to a wire of r/2 radius, then the resistance becomes

Choose an answer

2R

4R

16R

Zero

The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Choose an answer

7.20 N

11.25 N

22.50 N

45.00

The henry is the unit for

Choose an answer

Resistance

Magnetic flux

Magnetic field

Inductance

In a simple harmonic motion the kinetic energy (KE) and the potential energy (PE), are such that throughout the motion

Choose an answer

KE remains constant

PE remains constant

KE/PE is constant

KE+PE remains constant

Energy is stored in the choke coil in the form of

Choose an answer

Heat

Magnetic energy

Electric energy

Electro-magnetic energy

In Young's experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If its produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be

Choose an answer

60 x 10^-4cm

10 x 10^-4cm

10 x 10^-5cm

6 x 10^-5cm

Ultra-violet radiation of 6.2 eV falls on an aluminium surface. K.E. of fastest electron emitted is (Work function = 4.2 eV)

Choose an answer

3.2 x 10-21 J

3.2 x 10-19 J

7 x 10-25 J

9 x 10-32 J

More Classes

Other Links

NAT II Physical Science Physics MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer