Current Electricity

Related Questions

• Two batteries of e.m.f. 4V and 8 V with internal resistances $1 \Omega$ and $2 \Omega$ are connected in a circuit with a resistance of $9 \Omega$ as shown in figure. The current and potential difference between the points P and Q are

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• For a cell of e.m.f. 2V, a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a $2\,\Omega $ resistor and the balance is obtained across 40 cm of the wire, then the internal resistance of the cell is

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• A resistor ${R_1}$ dissipates the power P when connected to a certain generator. If the resistor ${R_2}$ is put in series with ${R_1}$, the power dissipated by

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• If an electron revolves in the path of a circle of radius of $0.5 \times 10^{–10}m$ at frequency of $5 \times 10^{15}$ cycles/s the electric current in the circle is (Charge of an electron = $1.6 \times 10^{–19} C$ )

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• Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is

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