ELECTRIC CURRENT (20-11-24)

Which of the following materials is a good conductor of electricity?

• Wood
  

• 
  Plastic
  

• 
  Copper
  

• Rubber

What is the unit of electric current?

• Volt
  

• Ohm
  

• 
  Ampere
  

• Joule

Electric current is the flow of:

• Atoms
  

• Electrons
  

• Neutrons
  

• Protons

4. What will happen if the switch in a circuit is open?
   

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• 4. Current flows continuously
     

• 4. Bulb will glow
     

• 4. No current flows
     

• 4. Current flows faster

7. Which of these uses electrical energy to produce light?
   

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• 7. Electric motor
     

• 7. Light-emitting diode (LED)
     

• 7. Loudspeaker
     

• 7. Geyser

Why should electrical appliances not be operated with wet hands?

• Hands might slip
  

• Water is a good conductor of electricity
  

• It damages the appliance
  

• It wastes electricity

Which material is used to make the filament of an electric bulb?

• Copper
  

• Tungsten
  

• Aluminium
  

• Silver

Which device is used to protect electrical appliances from overloading?

• Transformer
  

• Circuit breaker
  

• Light bulb
  

• Generator

Which of the following materials is used for electrical insulation?

• Aluminium
  

• Rubber
  

• Steel
  

• Copper

A person is electrocuted when:

• They touch a live wire
  

• They use rubber gloves
  

• They stand on a wooden plank
  

• The switch is turned off