class 8_ science_ lesson 1 to 8_ one mark test _April 2023

Electric current is a ______quantity

• base

• supplementary

• derive

The closeness of the measured value to the original value is

• Accuracy

• Precision

Luminous intensity is the intensity of

• visible light

• uv light

Unit of pressure is--

• Pascal

• Nm–2

• Poise

• both Pascal and Nm-2

The value of the atmospheric pressure at sea level is

• 76 cm of mercury column

• 7.6 cm of mercury column

Hydraulic lift works under the principle of

• Pascal

• newton

• ampere

The spherical mirror with a reflecting surface curved inward is called

• concave mirror

• convex mirror

If the angle of incidence is 45°, then the angle of reflection is

• 45°

• 44°

• 55°

• 450°

Conduction is the way of heat transfer which takes place in a__

• solid

• liquid

• gas

The process of converting a substance from gaseous state to solid state is called

• deposition.

• sublimation