Current Electricity

Related Questions

• An electric kettle has two heating coils. When one coil is used, water in the kettle boils in 5 minutes, while when second coil is used, same water boils in 10 minutes. If the two coils, connected in parallel are used simultaneously, the same water will boil in time

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• Three light bulbs of 40 W, 60 W and 100 W are connected in series with 220 V source. Which one of the bulbs will glow brightest

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• A current Iis passing through a wire having two sections P and Q of uniform diameters $d$ and $d/2$ respectively. If the mean drift velocity of electrons in sections P and Q is denoted by $v_P$ and $v_Q$ respectively, then

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• The potential difference between points $A$ and $B$ of adjoining figure is

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• The e.m.f. of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of $2\,\Omega $ is connected as a shunt with the cell, the balance point is obtained at $100\,cm$. The internal resistance of the cell is

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