Grade 6 Electronic

A secondary cell is

• Car battery

• Dry cell

• Simple cell

• Wrist watch battery

The standard symbol of ammeter is

• 
• 
• 
• 

What is the unit used to measure the resistance of a conductor?

• Ampere

• Ohm

• watts

• Volts

What is shown by this diagram?

• Diode

• Resistor

• LED

• Switch

Where coal power plant is located in Sri lanka?

• Kelanithissa

• Victoria

• Norochchole

• Hambanthota

The type of chemical cells which are

exhausted in use and after a certain period of time, they become inactive. They are known as

• Mobile phone

• Primary cells

• Secondary cells

• Solar panel

What is the special name given for the resistors which value can be changed?

• Permanent resistors

• Variable resistors

• Light dependent resistors

• Not specified

When light falls on LDR the resistance

• decreases

• increases

• not change

Which thing is used to produce electricity in hydro power stastions?

• Chemicals

• Sunlight

• Coal

• Flowing water

Which of the following is not a precaution of accidents caused by electricity?

• Do not fix antennas neat current wires

• Avoid touching electrical circuit and and appliances with wet hand

• Plug several electrical appliances to one socket.

• Do not let children go near electrical sockets