CURRENT ELECTRICITY/REVISION QUESTIONS

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Give the condition in which terminal voltage across a secondary cell is equal to its emf.
Why do we prefer a potentiometer with a longer bridge wire?
What will happen to the conductivity of an electrolyte when the temperature is increased?
Which cell among primary or secondary , will produce a larger current and why?
Write the dimensional formula of electrical conductivity.
How does the drift velocity of electrons in a metallic conductor vary with the increase in temperature?
What is the rate of production of heat when current I flows through a conductor of potential drop V ?
Nichrome and copper wire of same length and area of cross section are connected in series, current is passed through them,why does the nichrome wire gets heated first?
Write two special characteristics of the wire of an electric heater.
How many Kilowatt hours are there in 1 Joule?

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