Current Electricity

Related Questions

• A uniform wire of resistance $9 \Omega$ is cut into 3 equal parts. They are connected in the form of equilateral triangle ABC. A cell of e.m.f. 2 V and negligible internal resistance is connected across B and C. Potential difference across AB is

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• Resistances of 6 ohm each are connected in the manner shown in adjoining figure. With the current 0.5 ampere as shown in figure, the potential difference ${V_P} - {V_Q}$ is

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• The internal resistance of a cell is the resistance of

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• The current flowing through a lamp marked as 50 W and 250 V is

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• The resistivity of iron is $1 \times {10^{ - 7}}\,ohm - m$. The resistance of a iron wire of particular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in $ohm - m$ will be

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