Physics MCQS with Answers
A train of 150 m length is going towards north direction at a speed of 10 ms-1. A parrot flies at a speed of 5 ms-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
8 s
10 s
12 s
15 s
What remains constant when the earth revolves around the sun?
Linear kinetic energy
Linear momentum
Angular kinetic energy
Angular momentum
The volt/metre is the unit of:
Force
Work
Potential
Electric field intensity
The half-life of a radio-isotope is 5 years. The fraction of atoms decayed in this substance after 15 years will be
8-May
8-Jul
4-Mar
1
A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen
No change either in size or in intensity
Intensity of the image will decrease
Half the image will disappear
Intensity of image will increase
Choose the correct statement
An ammeter should have small resistance and a voltmeter should have large resistance
An ammeter should have large resistance and a voltmeter should have small resistance
Both an ammeter and a voltmeter should have large resistance
Both an ammeter and voltmeter should have small resistance
According to classical theory the proposed circular path of an electron in Rutherford model of atom will be
Straight line
Circular
Parabolic
Spiral
The velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is:
6
8
4
7
A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if
The mass of the pendulum is increased
The mass of the pendulum is decreased
The length of the pendulum is increased
The length of the pendulum is decreased
For production of beats the two sources must have
Different frequencies and same amplitude
Different frequencies
Different frequencies, same amplitude and same phase
Different frequencies and same phase
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