Question

When a 12V battery is connected across an unknown resistor there is a current of 2.5mA in the circuit calculate the resistance of the resistor​

Answer 1

Answer:

✔️✔️4800ohm✔️✔️

explanation :-

V = 12V

I = 2.5×10^-3 A

= 25×10^-4 A

according to ohm's law :

V = IR

12 = 25×10^-4 × R

12/25×10^-4 = R

12 × 10^4 / 25 = R

120000 / 25 = R

4800ohm = R

HOPE IT HELPS YOU ❣️

Answer 2

$\mathfrak{\large{\underline{\underline{Given:-}}}}$

Potential difference = 12 V

Current in circuit = 2.5 mA or2.5 $\times {10}^{ - 3} A$

$\mathfrak{\large{\underline{\underline{To find:-}}}}$

The resistance of unknown resistor

$\mathfrak{\large{\underline{\underline{Answer:-}}}}$

By using ohm's law we have,

$\bold{R = \frac{v}{i} }$

$\implies$ $\bold{R = \frac{12}{2.5 \times {10}^{ - 3} } }$

$\implies$ $\bold{R=4.8 × {10}^{3}Ω}$

therefore,the resistance of resistor is $\sf\red{\underline{4800 Ω}}$