Two electric circuits $I$ and $II$ are shown in figure
$(i)$ Which of the two circuits has more resistance ?
$(ii)$ Through which circuit, more current passes ?
$(iii)$ In which circuit, the potential difference across each resistor is equal.
Two electric circuits $I$ and $II$ are shown in figure
$(i)$ Which of the two circuits has more resistance ?
$(ii)$ Through which circuit, more current passes ?
$(iii)$ In which circuit, the potential difference across each resistor is equal.
$(i)$ The net resistance of series combination of resistors is more than the net resistance of the parallel combination of resistors. So, the resistance of circuit $I$ is more than the resistance of circuit $II.$
$(ii)$ Since current is inversely proportional to resistance for the same potential, therefore, current in circuit $II$ is more than the current in circuit $I$
$(iii)$ Potential difference across each resistor in circuit $II$ is equal.
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$(c)$ State any one advantage of connecting electrical devices in parallel with the mains instead of connecting them in series in a household circuit.
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$(b)$ Draw a schematic diagram of a circuit consisting of a battery of $12 V$, three resistors of $5\, \Omega, 10\, \Omega$ and $20\, \Omega$ connected in parallel, an ammeter to measure the total current through the circuit, $a$ voltmeter to measure the potential difference across the combination of resistors.
$(c)$ State any one advantage of connecting electrical devices in parallel with the mains instead of connecting them in series in a household circuit.
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