Current Electricity Charging Discharging Of Capacitors Question 487
Question: The internal resistance of a primary cell is 4 ohm. It generates a current of 0.2 amp in an external resistance of 21 ohm. The rate at which chemical energy is consumed in providing the current is
[MP PMT 1994]
Options:
A) $ 0.42,J/s $
B) $ 0.84,J/s $
C) $ 5,J/s $
D) $ 1,J/s $
Show Answer
Answer:
Correct Answer: D
Solution:
$ \frac{H}{t}=i^{2}R $ . Here total $ R=(21+4)=25\Omega $
Therefore Rate of energy consumed $ =0.2\times 0.2\times 25 $
$ = 1,\text{J}/s
BETA
