Question 137: Current Electricity

Question

Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance 2000 $$\Omega$$ is used to measure the potential difference across 500 $$\Omega$$ resistor, the reading of the voltmeter will be ___________ V.

Accepted Answer

New $${R_{eff}} = {{2000 	imes 500} \over {2500}} + 600\,\Omega  = 1000\,\Omega $$
$$\Rightarrow$$ Reading of voltmeter $$ = {{400} \over {1000}} 	imes 20 = 8$$ volts

Current Electricity

Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance 2000 $\Omega is used to measure the potential difference across 500 \Omega$ resistor, the reading of the voltmeter will be ___________ V.

Integer / Numeric Answer Type