question_answer

An energy source will supply a constant current into the load, if its internal resistance is [AIEEE 2005]

A) equal to the resistance of the load

B) very large as compared to the load resistance

C) zero

D) non-zero but less than the resistance of the load

Correct Answer: C

Solution :

[c] The current through the circuit is given by

\[l=\frac{E}{R+r}\]

where,   external resistance

internal resistance

\[l=\frac{E}{R}\]constant, when