An ammeter reads 0 to 10 A. It has negligible resistance.To... | Physics | SolveeIt | Solveeit

Today, August 19

Question

An ammeter reads 0 to 10 A. It has negligible resistance.To convert this into voltmeter to read upto 250 V, resistance to be used is

A

$25\,\Omega$ . in sereis

B

$25\,\Omega$ in parallel

C

$2500\,\Omega$ in series

D

$2.5\,\Omega$ in parallel

Answer

$25\,\Omega$ . in sereis

Explanation

Solution

Using, R = $\frac{V}{I_g}$ - G we get, R = $\frac{250}{10}$ - 0 = 25 $\Omega$
Thus 25 $\Omega$ resistor should be connected in series with the meter to convert it into voltmeter