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

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

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.

  • 10 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 student measures the terminal potential difference (V) of a cell (of emf E and internal resistance r) as a function of the current (I) flowing through it. The slope and intercept, of the graph between V and I, then, respectively, equal:

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When a capacitor \mathrm{C} is connected to a battery through a resistance \mathrm{R}, the plates of the capacitor will acquire equal and opposite charge and potential difference across it become equal to the emf of battery. The process called charging takes sometime and during this time there is an electric current through the resistance. If at any time t, q is the charge on capacitor, then from Kirchoff's law.
\mathrm{R \frac{d q}{d t}+\frac{q}{c}=E }
In the circuit shown, the battery is ideal with emf \mathrm{V}. The capacitor is initially uncharged. The switch \mathrm{S} is closed at \mathrm{t}=0

Question:-

The charge on the capacitor at time is
 

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 t:

  • no current is taken from the cell.

  • The potential difference between A and B

  • The potential difference between C and D

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:

  2. When the cell is being charged:

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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