Current Electricity Charging Discharging Of Capacitors Question 634
Question: A battery has e.m.f. 4 V and internal resistance r. When this battery is connected to an external resistance of 2 ohms, a current of 1 amp. flows in the circuit. How much current will flow if the terminals of the battery are connected directly
[MP PET 2001]
Options:
A) 1 amp
B) 2 amp
C) 4 amp
D) Infinite
Show Answer
Answer:
Correct Answer: B
Solution:
$ i=\frac{E}{R+r}\Rightarrow 1=\frac{4}{2+r}=r=2\Omega $ Short circuit when terminals of battery connected directly then current flows which is $ i _{SC}=\frac{E}{r}=\frac{4}{2}=2A $ .
BETA
