Q. 214.2( 6 Votes )

# A cell of emf E and internal resistance r is connected across an external resistance R. Plot a graph showing the variation of P.D. across R, verses R.

Answer :

A cell of emf E and internal resistance r is connected across an external resistance R.

Here current =

Let V be the potential difference across R, then

Hence, the graph is given by,

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An inductance of 2.0 H, a capacitance of 18 μF and a resistance of 10 kΩ are connected to an AC source of 20 V with adjustable frequency.

(a) What frequency should be chosen to maximize the current in the circuit?

(b) What is the value of this maximum current?

HC Verma - Concepts of Physics Part 2

A cell of emf E and internal resistance r is connected across an external resistance R. Plot a graph showing the variation of P.D. across R, verses R.

Physics - ExemplarTwo non-ideal batteries are connected in series. Consider the following statements:

(A) The equivalent emf is larger than either of the two emfs.

(B) The equivalent internal resistance is smaller than either of the two internal resistances.

HC Verma - Concepts of Physics Part 2

Does a conductor become charged when a current is passed through it?

HC Verma - Concepts of Physics Part 2