Options:
- A. 30
- B. 60
- C. 90
- D. 120
View Answer
D. 120
Physics
I ^. (j^ x k^) is equal to______________?
Options:
- A. 1
- B. i^
- C. j^
- D. k^
View Answer
A. 1
During fusion of hydrogen into helium________________?
Options:
- A. Energy is absorbed
- B. Energy is released
- C. Mass is increased due to energy absorption
- D. Mass is reduced due to the energy released
View Answer
B. Energy is released
The fission chain reaction in a nuclear reactor can be controlled by introducing _______________?
Options:
- A. Iron rods
- B. Graphite rods
- C. Cadmium rods
- D. Platinum rods
View Answer
C. Cadmium rods
The source of tidal energy is____________________?
Options:
- A. sun
- B. earth
- C. both A and B
- D. moon
View Answer
D. moon
When two protons are brought together_____________________?
Options:
- A. Kinetic energy increases
- B. P.E. between them increases
- C. P.E. between them decreases
- D. P.E. between tem does not change
View Answer
B. P.E. between them increases
Formation of large molecule by joining small molecules is_________________?
Options:
- A. Fusion
- B. Polymerization
- C. Crystallization
- D. Subtraction
View Answer
B. Polymerization
Materials that undergo plastic deformation before breaking are called __________________?
Options:
- A. Brittle
- B. Ductile
- C. Amorphous
- D. Polymers
View Answer
B. Ductile
Two parallel wires carrying currents in the opposite directions____________________?
Options:
- A. repel each other
- B. attract each other
- C. have no effect upon each other
- D. they cancel out their individual magnetic fields
View Answer
A. repel each other
If a current carrying solenoid is suspended freely it will__________________?
Options:
- A. be rotating
- B. come to rest in N-S direction
- C. vibrating like galvanometer needle
- D. comes to rest after rotation
View Answer
B. come to rest in N-S direction