What is the SI unit of power?

• Boyle

• Watt

• Newton

• Pascal

Which of the following pair is incorrect?
I.   Parsec - Distance
II.  Barrel - Liquid
III. Light Year - Time

• Only III

• Only I and III

• Only II

• All are correct

When light passes from one medium to another, this phenomenon of change in its direction is called ...............

• Refraction

• Diffraction

• Propagation

• No option is correct

Who discovered electron?

• E. Goldstein

• J.J. Thomson

• Ernest Rutherford

• J. Chadwick

Who invented radar?

• Fred Morrison

• A.H. Taylor and Leo C. Young

• Van Tassel

• W.K. Roentgen

The sliding friction is ............... than the static friction.

• double

• same

• greater

• smaller

Kelvin (K) is the unit of measurement of...................

• Density

• Pressure

• Mass

• Temperature

168.

In science a push or pull of an object is called ............

• Pick

• Lift

• Force

• Shut

In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called .............

• force

• acceleration

• friction

• inertia

The time taken by a pendulum to complete one oscillation is called

• Maximum speed

• Average speed

• Time period

• Time interval