general Science 9th

Which one is not the unit of energy?

• Joules

• Watt

• Kilowatt hour

• Calorie

Which types of power provides pollution free form of energy?

• Thermal power plants

• Nuclear power plants

• Hydroelectric power plants

• none of these

Which one is not the renewable energy sources?

• Oil and gas

• Solar energy

• Wind energy

• Nuclear fuel

Which is the main source of energy on earth?

• Nuclear energy

• Hydroelectric power

• Sun

• Fossil fuel

A diode is used as:

• Amplifier

• Modulator

• Rectifier

• High resistor

The number of basic units in a computer are:

• 2

• 5

• 3

• 4

The range of T.V transmission from T.V. antenna.

• 100km

• 40km

• 60km

• 50km

The device that sound waves into electrical signals is called:

• Rectifier

• Loud speaker

• Microphone

• Oscillator

Which one is the odd thing?

• Digital watch

• Radio

• Juicer

• Calculator

Hydrogen gas makes up __% of the mass of the universe.

• 50%

• 98%

• 99%

• 90%