physics21 ss1

Which of the following quantities is not an example of force? 

• Mass     

• Tension   

• Weight 

• Friction

Formation of hydrogen bubbles at the copper plate of a primary cell is called?

• polarization.

• back e.m.f.

• electrolysis.

• local action.

Which of the following factors does not affect the rate of evaporation of a liquid?

• temperature

• volume

• wind

• surface area

A heat sensitive resistor made of a semiconductor is called?

• thermometer

• thermostat

• thermistor

• thermopile

Which of the following statements about the molecules of solids and liquids is correct? They both

• have weak attraction.

• have wide separations.

• exhibit random motion.

• exhibit vibratory motion.

A metallic sphere is heated from 27°C to 200°C Without change of state. Which of the following changes would have resulted from the heating?

• No changes occur in its volume and density

• Its volume increases and its density increases

• Its volume increases and its density decreases

• Its volume increases without a change in density

The acceleration of a moving object can be determined from the?

• slope of its distance-time graph.

• area under its distance-time graph.

• slope of its velocity-time graph.

• area under its velocity-time graph

The diagram illustrates the velocity- time graph of a body. Calculate the distance covered by the body during the motion.

• 15m

• 84m

• 72m

• 48m

Which of the following units is equivalent to the unit of electric current?

• C s⁻¹

• W

• J s⁻¹

• C

A ball is swung in a horizontal circle of center O with a constant speed. The acceleration is directed?

• Away from O

• Along the Circumference of the circle

• Towards centre O

• Along a tangent to the circle