Options:
- A. has zero acceleration
- B. has uniform acceleration
- C. has variable acceleration
- D. moves in a circle
View Answer
A. has zero acceleration
Physics
Why Ballistic missile fails in some circumstances of precision ?
Options:
- A. due to their shape
- B. due to air resistance
- C. due to angle of projection
- D. all of these
View Answer
B. due to air resistance
The distance covered by a body in time t starting from rest is__________________?
Options:
- A. at2/2
- B. Vt
- C. a2t/2
- D. at2
View Answer
A. at2/2
Newton estimated the speed of sound _____________________?
Options:
- A. 281m/sec
- B. 333m/sec
- C. 340m/sec
- D. all of the above
View Answer
A. 281m/sec
In open organ pipe___________________?
Options:
- A. only even harmonics are present
- B. only odd harmonics are present
- C. both even and odd harmonics are present
- D. selected harmonics are present
View Answer
C. both even and odd harmonics are present
Specific resistance of a wire____________________?
Options:
- A. will depend on its length
- B. will depend on its radius
- C. will depend on the type of material of the wire
- D. will depend on none of the above
View Answer
C. will depend on the type of material of the wire
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?
Options:
- A. 12
- B. 24
- C. 5
- D. 1100
View Answer
A. 12
In Young double slit experiment, if white light is used____________________?
Options:
- A. alternate dark and bright fringes will be seen
- B. coloured fringes will be seen
- C. no interference fringes will be seen
- D. impossible to predict
View Answer
B. coloured fringes will be seen
The locus of all points in a medium having the same phase of vibration is called____________________?
Options:
- A. crest
- B. trough
- C. wavelength
- D. wave front
View Answer
D. wave front
Work done by variable force is determine by dividing____________________?
Options:
- A. force into small interval
- B. displacement into small interval
- C. both force and displacement into small intervals
- D. force into small and displacement into large intervals
View Answer
B. displacement into small interval