Class 8 science

Muscular force is....

• non-contact force

• Magnetic force

• contact force

• An electrostatic force

1) The net force on an object is zero if the two forces acting on it is in

• Any direction

• Opposite direction

• Same direction

• none of the given

1) Type of force where only attraction is found is …

• Electrostatic force

• Gravitational force

• Magnetic force

• Frictional force

1) The strength of a force is expressed by its …

• Magnitude

• Magnitude and direction

• Direction

• Symbol

1) Which metal is coated on the cans used for storing food?

• Tin

• Chromium

• Zinc

• Iron

1) After the electroplating, mass of an object…

• Does not change

• Decreases

• Increases

• Cannot be predicted

1) Electroplating process is based on … effect of electricity.

• Physical

• Magnetic

• Heating

• Chemical

1) How many times is volume of the Jupiter than the earth?

• 500

• 1300

• 850

• 1700

1) Which of the following planets has phases like a moon?

• Jupiter

• Venus

• Saturn

• Uranus

1) What is the percentage of oxygen in the air?

• 12

• 21

• 78

• 35