Please please please please please please please please please please please please please please please please please answer this question... The question is — When a 22 ohms resistance is connected across its terminals a potential difference 2.2V is produced. Find the internal resistance and lost volt of the cell..Please solve ......
Answers
Answer:
12th
Physics
Current Electricity
EMF, Terminal Voltage and Internal Resistance and Problems on It
For a cell terminal potenti...
PHYSICS
avatar
Asked on December 27, 2019 by
Prateek Saluja
For a cell terminal potential difference is 2.2 volt when circuit is open and reduces to 1.8 volt when cell is connected to an external resistance of 5 ohm. What is the internal resistance of the cell?
MEDIUM
Share
Study later
ANSWER
P.D.=2.2volts , this is the EMF of the cell.
Now when the circuit is closed and a current is flowing through the circuit then the P.D.=1.8V
Thus the total resistance of the circuit is R+r=5+rohms
So, the current in the circuit is i=(
5+r
2.2
)
hence the PD across the internal resistance.
Given that,
r(
5+r
2.2
)=2.2−1.8 as the drop in the potential across the battery is due the P.D. across the internal resistance.
So,
r(
5+r
2.2
)=0.4
1.8r=2
r=1.11ohms
Answer:
Sister pls unblock the inbox sister pls ☹️☹️