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Charging Of Battery And Discharging Of Battery - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main

Quick Facts

  • Emf of a cell when the cell is charging and discharging and Open circuit and Short circuit is considered one of the most asked concept.

  • 8 Questions around this concept.

Solve by difficulty

The length of a wire of a potentiometer is 100 cm and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is 0.5 \Omega  If the balance point is obtained at l=30 cm from the positive end, the e.m.f. of the battery is :

 

A dry cell delivering 2 A has a terminal voltage 1.14V. What is the internal resistance of the cell if its open–circuit voltage is 1.59 V?

Concepts Covered - 1

Emf of a cell when the cell is charging and discharging and Open circuit and Short circuit

Emf of a cell when the cell is charging and discharging and Open circuit and Short circuit

Open circuit:

  • no current is taken from the cell. i=0

  • The potential difference between A and B V_{AB}=E

  • The potential difference between C and D V_{CD}=0

Short circuit

  • Two terminals of a cell are joined together by a thick conducting wire

  • Maximum current i=\frac{E}{r} 

  • V=0

Equation of cell 

  1. When supplying the current: E=V+iR

  2. When the cell is being charged: E=V-iR

Study it with Videos

Emf of a cell when the cell is charging and discharging and Open circuit and Short circuit

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