Current Electricity
Which of the following statement is true both for a series and a parallel D.C. circuit?

Currents are additive
Voltages are additive
Power are additive
Elements have individual currents

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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 decreased
None of these
Length of heating element should be increased

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