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Current Electricity

268217 The potential difference across a conductor is doubled, the rate of generation of heat will

1 become one fourth
2 be halved
3 bedoubledtimes
4 becomefour times
Current Electricity

268218 Two metallic wires of same material and same length have different diameters. W hen the wires are connected in parallel across an ideal battery the rate of heat produced in thinner wire is \(Q_{1}\) and that in thicker wire is \(Q_{2}\). The correct statement is

1 \(Q_{1}=Q_{2}\)
2 \(Q_{1}
3 \(Q_{1}\lt Q_{2}\)
4 I t will depend on theerff of the battery
Current Electricity

268219 Thereare two metalic wires of same material, same length but of different radii. W hen these are connected to an ideal battery in series, heat produced is \(\mathrm{H}_{1}\) but when connected in parallel, heat produced is \(\mathrm{H}_{2}\) for the same time. Then the correct statement is

1 \(\mathrm{H}_{1}=\mathrm{H}_{2}\)
2 \(\mathrm{H}_{1}<\mathrm{H}_{2}\)
3 \(\mathrm{H}_{1}\lt \mathrm{H}_{2}\)
4 No relation
Current Electricity

268220 Two electric bulbs rated \(P_{1}\) watt and \(V\) volt, are connected in series, across \(V\)-volt supply. Thetotal power consumed is

1 \(\frac{P_{1}+P_{2}}{2}\)
2 \(\sqrt{P_{1} \cdot P_{2}}\)
3 \(\frac{P_{1} \cdot P_{2}}{P_{1}+P_{2}}\)
4 \(\left(P_{1}+P_{2}\right)\)
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Current Electricity

268217 The potential difference across a conductor is doubled, the rate of generation of heat will

1 become one fourth
2 be halved
3 bedoubledtimes
4 becomefour times
Current Electricity

268218 Two metallic wires of same material and same length have different diameters. W hen the wires are connected in parallel across an ideal battery the rate of heat produced in thinner wire is \(Q_{1}\) and that in thicker wire is \(Q_{2}\). The correct statement is

1 \(Q_{1}=Q_{2}\)
2 \(Q_{1}
3 \(Q_{1}\lt Q_{2}\)
4 I t will depend on theerff of the battery
Current Electricity

268219 Thereare two metalic wires of same material, same length but of different radii. W hen these are connected to an ideal battery in series, heat produced is \(\mathrm{H}_{1}\) but when connected in parallel, heat produced is \(\mathrm{H}_{2}\) for the same time. Then the correct statement is

1 \(\mathrm{H}_{1}=\mathrm{H}_{2}\)
2 \(\mathrm{H}_{1}<\mathrm{H}_{2}\)
3 \(\mathrm{H}_{1}\lt \mathrm{H}_{2}\)
4 No relation
Current Electricity

268220 Two electric bulbs rated \(P_{1}\) watt and \(V\) volt, are connected in series, across \(V\)-volt supply. Thetotal power consumed is

1 \(\frac{P_{1}+P_{2}}{2}\)
2 \(\sqrt{P_{1} \cdot P_{2}}\)
3 \(\frac{P_{1} \cdot P_{2}}{P_{1}+P_{2}}\)
4 \(\left(P_{1}+P_{2}\right)\)
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Current Electricity

268217 The potential difference across a conductor is doubled, the rate of generation of heat will

1 become one fourth
2 be halved
3 bedoubledtimes
4 becomefour times
Current Electricity

268218 Two metallic wires of same material and same length have different diameters. W hen the wires are connected in parallel across an ideal battery the rate of heat produced in thinner wire is \(Q_{1}\) and that in thicker wire is \(Q_{2}\). The correct statement is

1 \(Q_{1}=Q_{2}\)
2 \(Q_{1}
3 \(Q_{1}\lt Q_{2}\)
4 I t will depend on theerff of the battery
Current Electricity

268219 Thereare two metalic wires of same material, same length but of different radii. W hen these are connected to an ideal battery in series, heat produced is \(\mathrm{H}_{1}\) but when connected in parallel, heat produced is \(\mathrm{H}_{2}\) for the same time. Then the correct statement is

1 \(\mathrm{H}_{1}=\mathrm{H}_{2}\)
2 \(\mathrm{H}_{1}<\mathrm{H}_{2}\)
3 \(\mathrm{H}_{1}\lt \mathrm{H}_{2}\)
4 No relation
Current Electricity

268220 Two electric bulbs rated \(P_{1}\) watt and \(V\) volt, are connected in series, across \(V\)-volt supply. Thetotal power consumed is

1 \(\frac{P_{1}+P_{2}}{2}\)
2 \(\sqrt{P_{1} \cdot P_{2}}\)
3 \(\frac{P_{1} \cdot P_{2}}{P_{1}+P_{2}}\)
4 \(\left(P_{1}+P_{2}\right)\)
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Current Electricity

268217 The potential difference across a conductor is doubled, the rate of generation of heat will

1 become one fourth
2 be halved
3 bedoubledtimes
4 becomefour times
Current Electricity

268218 Two metallic wires of same material and same length have different diameters. W hen the wires are connected in parallel across an ideal battery the rate of heat produced in thinner wire is \(Q_{1}\) and that in thicker wire is \(Q_{2}\). The correct statement is

1 \(Q_{1}=Q_{2}\)
2 \(Q_{1}
3 \(Q_{1}\lt Q_{2}\)
4 I t will depend on theerff of the battery
Current Electricity

268219 Thereare two metalic wires of same material, same length but of different radii. W hen these are connected to an ideal battery in series, heat produced is \(\mathrm{H}_{1}\) but when connected in parallel, heat produced is \(\mathrm{H}_{2}\) for the same time. Then the correct statement is

1 \(\mathrm{H}_{1}=\mathrm{H}_{2}\)
2 \(\mathrm{H}_{1}<\mathrm{H}_{2}\)
3 \(\mathrm{H}_{1}\lt \mathrm{H}_{2}\)
4 No relation
Current Electricity

268220 Two electric bulbs rated \(P_{1}\) watt and \(V\) volt, are connected in series, across \(V\)-volt supply. Thetotal power consumed is

1 \(\frac{P_{1}+P_{2}}{2}\)
2 \(\sqrt{P_{1} \cdot P_{2}}\)
3 \(\frac{P_{1} \cdot P_{2}}{P_{1}+P_{2}}\)
4 \(\left(P_{1}+P_{2}\right)\)
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