Electric Current and Circuit

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Electric Current and Circuit: Overview

This topic covers concepts, such as Electric Current, Unit of Current, Electric Cell, Terminals of an Electric Cell, Basic Components of a Battery, Electromotive Force, Internal Resistances of Cell, Source of Electricity in an Electric Cell, Production of Electric Current in a Cell, Direction of Flow of Current outside a Cell, Direction of Flow of Current inside a Cell, Analogy of Electric Current with Water Flow, Conventional Direction of Electric Current, Current through a Conductor, Flow of Charge through Wire, Potential Difference across Terminals of Battery Getting Discharged & Uses of Electric Cells etc.

Important Questions on Electric Current and Circuit

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A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge density of the rod is ρ, how long will the charges take to travel a distance d?

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In a current carrying conductor the motion of an electron is 

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In an electric bulb filament, 0.5 A current is passed for 10 minutes. Calculate the electric charge passing through the circuit.

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A current of 0.5 A is drawn by a filament of and electric bulb for 10 minutes. The number of electrons flowing through the circuit are

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One ampere is synonymous with

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In a conducting wire, 15 C charge flows in 5 s. The current flowing in the conductor is :

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An electric lamp is marked 60 W. 240 V. If it operates at 200 V, the current through it will be

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The wire having a black plastic covering is a

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The wire having a red plastic covering is a

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Electricians use rubber gloves while working because

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Since the deflection amounts of the identical compasses found as shown above in the figure on the sides of the wires in the same medium over which I1, I2 and I3, currents pass are equal, what is the relationship between the currents?

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Wire X, Y and Z are lying in the same magnetic fields. As per information in the diagram predict the direction of force experiment by current carrying wire.

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When the currents in the figure pass through the flexible K and L wires, what is the position of the wires?

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The force between two parallel wires carrying current has been used to define

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Conventionally, the direction of the current is taken as

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If I is the current through a wire and e is the charge of electron, then the number of electrons in t seconds will be given by