First slide

Cell

Question

The figure shows a graph of current (I) flowing through a cell against its terminal voltage (V). The emf and internal resistance of this cell are :

Easy

A

1 V; 0.25 $Ω$
B

1 V; 4 $Ω$
C

1 V; 1 $Ω$
D

0.25V; 0.25 $Ω$

Solution

At I = 0, $E = V_{T}$
So, E = IV
When $V_{T} = 0, I = \frac{ε}{r}$
So, $r = \frac{1}{4} \Rightarrow r = 0.25 Ω$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App