Question

4. The internal resistance of a cell of emf 2v is 0.1 ohm It is connected to a resistance of 3.9 ohm
The voltage across the cell will be
a) 0.5 V
b) 1.5 V
C) 1.95 V
d) 2V​

Answer 1

Answer:

b) 1.95V

is the correct answer....

hope it will help you

Answer 2

Answer:

Given:

Internal Resistance of a cell (r) = 0.1 ohm

Emf of cell (e) = 2 V

External resistance of a cell (R) = 3.9 ohm

Find:

The voltage (V) across the cell.

Solution:

The above numerical can be solved by using the formula,

Voltage = emf × external resistance/ external resistance + internal resistance

V = $\frac{eR}{R+r}$

V = $\frac{2*3.9}{3.9 + 0.1}$

V = 1.95 V

The final answer will be 1.95 V, as the SI unit of voltage is Volt (V).

Hence, the voltage across the terminals of the cell will be 1.95 V.