Options:
- A. V esc = 1/2Vo
- B. V esc = -2 Vo
- C. V esc = Vo
- D. V esc = 2Vo
View Answer
B. V esc = -2 Vo
Physics
A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?
Options:
- A. The extension of the wire is proportional to the force applied
- B. The weight of the wire is negligible
- C. The wire is not stretched beyond its elastic limit
- D. The cross sectional area of the wire remains constant
View Answer
A. The extension of the wire is proportional to the force applied
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
A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?
Options:
- A. man does more work than child
- B. child does more work than man
- C. both do the same amount of work
- D. it is a foolish question
View Answer
B. child does more work than man
The energy band occupied by the valence electrons is called___________________?
Options:
- A. Energy state
- B. Valence band
- C. ve energy state
- D. conduction band
View Answer
B. Valence band
The area under the force displacement graph represents__________________?
Options:
- A. area
- B. work done
- C. power
- D. none of these
View Answer
B. work done
A ferromagnet will become fully magnetized at_________________?
Options:
- A. High voltage A.C
- B. Low voltage A.C
- C. Alternating current at its peak value
- D. D.C current at peak value
View Answer
C. Alternating current at its peak value
Propulsion force of a rocket is____________________?
Options:
- A. non-conservative force
- B. conservative force
- C. both A and B
- D. none of these
View Answer
A. non-conservative force
Materials in which valence electrons are tightly bound to their atoms at low temperature are called___________________?
Options:
- A. Semi conductor
- B. Super conductors
- C. Insulators
- D. Conductor
View Answer
C. Insulators