Electric Current and Its Effects-3

Which of the following devices does not work on heating effect of current?

• electric bulb

• fuse

• electric bell

• immersion rod

On what principle is electric bell based?

• heating effect of current

• magnetic effect of current

What is the full form of MCB?

• Miniature Circuit Board

• Miniature Circuit Breaker

• Multimeter Circuit Board

What is the direction of conventional current flow?

• from positive terminal to negative terminal

• from positive terminal to positive terminal

• from negative terminal to positive terminal

• from negative terminal to negative terminal

Which wire would have more resistance?

• long and thick

• short and thick

• long and thin

• short and thin

In which wire, the heat produced would be minimum?

• Copper wire of length 10 cm

• Copper wire of length 20 cm

• Nichrome wire of length 10 cm

• Tungsten wire of length 20 cm

Identify correct statements. (Select all correct options)

• The filament type electric bulbs are  power-efficient.

• CFLs do not work on the heating effect of current.

• CFLs are more expensive than electric bulb.

• CFLs consume more electricity than electric bulb.

Electric fuse, when gets heated too much, breaks

• electrical appliances

• electric current

• electric circuit

• short-circuit

Which of the following devices work on heating effect of the current? (Select all correct options)

• Electric bulb

• Electric iron

• Electric bell

• Fuse

• immersion rod

Which of the following devices work on heating effect of the current? (Select all correct options)

• Electric oven

• Loudspeakers

• Cranes with strong electromagnet

• Telegraph

• Electric kettle