Current Electricity
In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains

Length of heating element has no effect on heating if water
Length of heating element should be increased
None of these
Length of heating element should be decreased

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Current Electricity
In the case of direct current

Magnitude of current changes with time
Magnitude of current remains constant
Magnitude and direction of current changes with time
Magnitude and direction of current remains constant

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