Physics MCQS

971. A force acting perpendicular to the displacement is?
A. No work
B. Positive work
C. Minimum work
D. Negative work

972. Unit of work in base unit is?
A. kgm-1sec-2
B. kgmsec2
C. kgm2sec-2
D. None of the above

973. The work done is half of the maximum value if the angle between force and displacement is?
A. 45 Degrees
B. 60 Degrees
C. 90 Degrees
D. 180 Degrees

974. The work done will be zero when the angle between force and displacement is?
A. Zero Degrees
B. 30 Degrees
C. 60 Degrees
D. 90 Degrees

975. Work done is maximum when the angle between force and displacement is?
A. Zero Degrees
B. 45 Degrees
C. 90 Degrees
D. 180 Degrees

976. The work done is negative when the angle between the force and displacement is?
A. Zero Degrees
B. 45 Degrees
C. 90 Degrees
D. 180 Degrees

977. Which one of the following cannot be polarized?
A. Radio waves
B. Ultraviolet rays
C. X-rays
D. Sound waves

978. Diffraction fringes are:
A. Equally spaced
B. The distance between them increases
C. The distance between them decreases
D. They are adjacent with no space in between

979. In monochromatic red light, a blue book will probably appear to be:
A. Black
B. Purple
C. Green
D. No scientific reasoning available

980. A thing that emits its own light is:
A. Luminous
B. Non-luminous
C. Incandescent
D. Bright