Options:
- A. frictional force
- B. gravitational force
- C. elastic force
- D. centripetal force
View Answer
D. centripetal force
Physics
The source of geothermal energy is___________________?
Options:
- A. decay of radioactive element in the earth
- B. compression of material in the earth
- C. residual lost of the earth
- D. all as said in A
View Answer
D. all as said in A
An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?
Options:
- A. 3.5 x 103 J
- B. 3.5 x 104 J
- C. 3.5 x 106 J
- D. 3.5 x 109 J
View Answer
D. 3.5 x 109 J
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 relation between horse power and watt is_________________?
Options:
- A. 1 hp = 546 watts
- B. 1 hp = 746 watts
- C. 1 hp = 1000 watts
- D. 1 hp = 946 watts
View Answer
B. 1 hp = 746 watts
A light ray traveling form rarer to denser medium suffers a phase change of__________________?
Options:
- A. 60
- B. 90
- C. 180
- D. 45
View Answer
C. 180
If velocity is doubled then__________________?
Options:
- A. momentum increases 4 times and K.E increases 2 times
- B. momentum and K.E. remain same
- C. momentum increases 2 times and K.E increases constant
- D. momentum increases 2 times and K.E increases 4 time
View Answer
D. momentum increases 2 times and K.E increases 4 time
Slope of work time graph is equal to____________________?
Options:
- A. displacement
- B. acceleration
- C. power
- D. energy
View Answer
C. power
Diffraction effect is____________________?
Options:
- A. more for a round edge
- B. less for a round edge
- C. more for a sharp edge
- D. less for a sharp edge
View Answer
C. more for a sharp edge
Which of the following is not conservative force_________________?
Options:
- A. friction
- B. electric
- C. gravitational
- D. magnetic
View Answer
A. friction