Options:
- A. 4.2 km S-1
- B. 7.5 km S-1
- C. 9.5 km S-1
- D. 1.1 km S-1
View Answer
D. 1.1 km S-1
Physics
Diffraction fringes are____________________?
Options:
- A. equally spaced
- B. distance between them increases
- C. distance between then decreases
- D. they are adjacent with no space in between
View Answer
C. distance between then decreases
If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is ___________________?
Options:
- A. 1600 ms-1
- B. 50.6 ms-1
- C. 71.6 ms-1
- D. 2263ms-1
View Answer
B. 50.6 ms-1
A thing that emits its own light is___________________?
Options:
- A. luminous
- B. non-luminous
- C. incandescent
- D. bright
View Answer
A. luminous
When arrow is released form its bow, its energy is transformed from _____________________?
Options:
- A. heat energy to K.E
- B. elastic P.E to K.E
- C. elemical energy to elastic P.E
- D. K.E to elastic P.E.
View Answer
B. elastic P.E to K.E
Gives the definition of metre in terms of wavelength of red cadmium light ___________________?
Options:
- A. Newton
- B. Einstein
- C. Michelson
- D. Galileo
View Answer
C. Michelson
The work done by friction is__________________?
Options:
- A. positive
- B. negative
- C. zero
- D. none of these
View Answer
B. negative
Which experiment shows that wavelength of light is smaller than that of sound___________________?
Options:
- A. Diffraction
- B. Polarization
- C. Interference
- D. Reflection
View Answer
A. Diffraction
The dimension of power is_______________?
Options:
- A. [ML2T-3]
- B. [ML2T-2]
- C. [ML2T3]
- D. none of these
View Answer
A. [ML2T-3]
When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?
Options:
- A. zero
- B. minimum
- C. infinity
- D. maximum
View Answer
D. maximum