Options:
- A. 5000 nm
- B. 5000A
- C. 500m
- D. 2000um
View Answer
B. 5000A
Physics
appearance of colour in thin films is due to ____________________?
Options:
- A. diffraction
- B. dispersion
- C. interference
- D. polarization
View Answer
C. interference
Work done by the force of friction is____________________?
Options:
- A. always positive
- B. always negative
- C. positive only for small frictional force
- D. positive only for large frictional force
View Answer
B. always negative
The branch of physics which deals with the living things is called_________?
Options:
- A. biological sciences
- B. physical sciences
- C. cell systems
- D. elementary physics
View Answer
A. biological sciences
The dimension of force is____________________?
Options:
- A. MLT-2
- B. ML2T-2
- C. ML2T2
- D. ML-2T-2
View Answer
A. MLT-2
Which law of motion is also called law of inertia ?
Options:
- A. 1st law
- B. 2nd law
- C. 3rd law
- D. all 1st, 2nd and 3rd laws
View Answer
A. 1st law
Waves transmit ________________ from one place to another?
Options:
- A. energy
- B. mass
- C. both
- D. none
View Answer
A. energy
The waves that require a material medium for their propagation are called__________________?
Options:
- A. matter waves
- B. electromagnetic waves
- C. carrier waves
- D. mechanical waves
View Answer
D. mechanical waves
The beats frequency (sensible) for a human car is _____________________?
Options:
- A. 42Hz
- B. 7 Hz
- C. 256Hz
- D. 262Hz
View Answer
B. 7 Hz
Why should a resistance be introduced in a circuit in series deliberately ?
Options:
- A. to increase current
- B. to decrease current
- C. to control current
- D. just to give a good look to circuit
View Answer
B. to decrease current