Question

If in the circuit shown in figure below, the reading on the voltmeter is 5 V and the reading on the ammeter is 25 mA, the resistance of resistor R is:

Answer 1

• Voltage=V=5V
• Current=I=25mA=25×10^-3A
• Resistance be R

Apply ohms law

`\\ \rm\hookrightarrow R=(V)/(I)`

`\\ \rm\hookrightarrow R=(5)/(25* 10^(-3))`

`\\ \rm\hookrightarrow R=0.2* 10^(-3)`

`\\ \rm\hookrightarrow R=0.0002\Omega`