Current Electri...

A heater boils 1kg of water in time 1 t and another heater boils the same water in time t₂ If both are connected in series, the combination will boil the same water in time.

The drift velocity of free electrons in a conductor is v, when a current. I is flowing in it If both the radius and current are doubled, then drift velocity will be.

There are n resistors having equal value of resistance r. First they are connected in such a way that the possible minimum value of resistance is obtained. Then they are connected in such a way that possible maximum value of resistance is obtained the ratio of minimum and maximum values of resistances obtained in these way is....

Temperature of a conductor increases by 5^o C passing electric current for some time. The increase in its temperature when double current is passed through the same conductor for the same time is.... ^o C

Area of cross-section of two wires of same length carrying same current is in the ratio of 1 : 2. Then the ratio of heat generated per second in the wires = ....

when current flowing through a conductor is I, average drift velocity of free electrons is V_d. Now when 6I current is flowing through a conductor having 3 times cross sectional are of same material what will be average dirft velocity of free electrons?