Physics MCQS with Answers Set 2

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Physics MCQS with Answers


If yellow light emitted by sodium lamp in Young’s double slit experiment is replaced by monochromatic blue light of the same intensity
The fringe width will remain unchanged
Fringe width will decrease
Fringes will becomes less intense
Fringe width will increase

When light wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however, light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters?
1:04
1:02
4:01
2:01

Radio waves of constant amplitude can be generated with
Rectifier
FET
Filter
oscillator

The angle between rectangular components of a vector is
90°
0°
120°
60°

Planck’s constant has the dimensions of:
Momentum
Energy
Frequency
Angular momentum

What remains constant in the field of central force?
Linear momentum
Kinetic energy
Potential energy
Angular momentum

For obtaining appreciable extension, the wire should be
Short and thin
Short and thick
Long and thick
Long and thin

A force of 10N is acting along y-axis. Its component along x-axis is
Zero N
10N
100N
20N

In Which case does the potential energy decreases?
On stretching a spring
One moving a body against gravitational force
One the rising of an air bubble in water
On compressing a spring

When the length of a microscope tube increases, its magnifying power
Increases
Decreases
May increases or decreases depending on the observer and the place of observation
Does not change

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