71)

‘Femto’ means ten raised to the power of ______.

SSC CPO 2020

A)

-12

B)

-16

C)

-20

D)

-15

72)

Power exerted by an object moving in a straight line is equal to Force multiplied by ______.

SSC CPO 2020

A)

Velocity

B)

Displacement

C)

Acceleration

D)

Work

73)

If an object executes 10 oscillations per second, then its frequency in kilohertz is equal to:

SSC CPO 2020

A)

1

B)

10

C)

0.01

D)

0.1

74)

Which among the following is an ‘action-at-a-distance’ force ?

SSC CPO 2020

A)

Friction

B)

Tension

C)

Pull

D)

Gravitation

75)

1 horse power is equal to approximately ______ watts.

SSC CPO 2020

A)

500

B)

750

C)

1000

D)

250

76)

Vibration of which among the following produces only odd harmonics?

SSC CPO 2020

A)

An air column in a closed organ pipe

B)

A vibrating rod fixed at two ends

C)

An air column in an open organ pipe

D)

A vibrating string fixed at two ends

77)

What is the meaning of the Greek origin word, ‘Elektron’?

SSC CPO 2020

A)

Ebonite

B)

Amber

C)

Charge

D)

Negative

78)

Standing in an open ground on a cloudless day, at what time will your shadow be the shortest?

SSC CPO 2020

A)

15:00

B)

07:00

C)

12:00

D)

09:00

79)

A set of equations involving electric and magnetic fields, and their sources, the charge and current densities are known as ______ equations.

SSC CPO 2020

A)

Newton’s

B)

Bhor’s

C)

Einstein’s

D)

Maxwell’s

80)

The charge has to be passed ______ to obtain maximum work from a galvanic cell.

SSC CPO 2020

A)

uniformly

B)

inversely

C)

proportionately

D)

reversibly