07. RC circuit (Charging, Time Constant, Discharging)
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Current Electricity

153106 The table shows four sets of values for the circuit elements, when the fully charged capacitor is discharged. Rank the sets according to the time required for the current to decreases to half its initial value, greatest first
| | 1 | 2 | 3 | 4 |
| :---: | :---: | :---: | :---: | :---: |
| $\mathrm{E}(\mathrm{V})$ | 12 | 12 | 10 | 10 |
| $\mathrm{R}(\Omega)$ | 2 | 3 | 10 | 5 |
| $\mathrm{C}(\mu \mathrm{F})$ | 3 | 2 | 0.5 | 2 |

1 $1,2,3,4$
2 $3,2=4,1$
3 $4,1=2,3$
4 $1,2=3,4$
AMU-2014
Current Electricity

153094 Which of the following acts as a circuit protection device?

1 Inductor
2 Switch
3 Fuse
4 Conductor
NEET National-2019
Current Electricity

153098 In the circuit shown, when the switch is closed, the capacitor charges with a time constant

1 $\mathrm{RC}$
2 $2 \mathrm{RC}$
3 $(1 / 2) \mathrm{RC}$
4 $\mathrm{RC} \ln 2$
BITSAT-2007
Current Electricity

153103 Assertion: A current continues to flow in super conducting coil even after switch is off.
Reason: Superconducting coils show Meissner effect.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Ans.(b)
Exp:B The assertion is true, even when the emf is switched off, the current continue to flow because its resistance becomes
Meissner effect vepals the magnetic field line from the interior of the superconductor.
AIIMS-2007
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Current Electricity

153106 The table shows four sets of values for the circuit elements, when the fully charged capacitor is discharged. Rank the sets according to the time required for the current to decreases to half its initial value, greatest first
| | 1 | 2 | 3 | 4 |
| :---: | :---: | :---: | :---: | :---: |
| $\mathrm{E}(\mathrm{V})$ | 12 | 12 | 10 | 10 |
| $\mathrm{R}(\Omega)$ | 2 | 3 | 10 | 5 |
| $\mathrm{C}(\mu \mathrm{F})$ | 3 | 2 | 0.5 | 2 |

1 $1,2,3,4$
2 $3,2=4,1$
3 $4,1=2,3$
4 $1,2=3,4$
AMU-2014
Current Electricity

153094 Which of the following acts as a circuit protection device?

1 Inductor
2 Switch
3 Fuse
4 Conductor
NEET National-2019
Current Electricity

153098 In the circuit shown, when the switch is closed, the capacitor charges with a time constant

1 $\mathrm{RC}$
2 $2 \mathrm{RC}$
3 $(1 / 2) \mathrm{RC}$
4 $\mathrm{RC} \ln 2$
BITSAT-2007
Current Electricity

153103 Assertion: A current continues to flow in super conducting coil even after switch is off.
Reason: Superconducting coils show Meissner effect.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Ans.(b)
Exp:B The assertion is true, even when the emf is switched off, the current continue to flow because its resistance becomes
Meissner effect vepals the magnetic field line from the interior of the superconductor.
AIIMS-2007
For More Updates join with Us
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Current Electricity

153106 The table shows four sets of values for the circuit elements, when the fully charged capacitor is discharged. Rank the sets according to the time required for the current to decreases to half its initial value, greatest first
| | 1 | 2 | 3 | 4 |
| :---: | :---: | :---: | :---: | :---: |
| $\mathrm{E}(\mathrm{V})$ | 12 | 12 | 10 | 10 |
| $\mathrm{R}(\Omega)$ | 2 | 3 | 10 | 5 |
| $\mathrm{C}(\mu \mathrm{F})$ | 3 | 2 | 0.5 | 2 |

1 $1,2,3,4$
2 $3,2=4,1$
3 $4,1=2,3$
4 $1,2=3,4$
AMU-2014
Current Electricity

153094 Which of the following acts as a circuit protection device?

1 Inductor
2 Switch
3 Fuse
4 Conductor
NEET National-2019
Current Electricity

153098 In the circuit shown, when the switch is closed, the capacitor charges with a time constant

1 $\mathrm{RC}$
2 $2 \mathrm{RC}$
3 $(1 / 2) \mathrm{RC}$
4 $\mathrm{RC} \ln 2$
BITSAT-2007
Current Electricity

153103 Assertion: A current continues to flow in super conducting coil even after switch is off.
Reason: Superconducting coils show Meissner effect.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Ans.(b)
Exp:B The assertion is true, even when the emf is switched off, the current continue to flow because its resistance becomes
Meissner effect vepals the magnetic field line from the interior of the superconductor.
AIIMS-2007
NEET DIGITAL LIBRARY
Current Electricity

153106 The table shows four sets of values for the circuit elements, when the fully charged capacitor is discharged. Rank the sets according to the time required for the current to decreases to half its initial value, greatest first
| | 1 | 2 | 3 | 4 |
| :---: | :---: | :---: | :---: | :---: |
| $\mathrm{E}(\mathrm{V})$ | 12 | 12 | 10 | 10 |
| $\mathrm{R}(\Omega)$ | 2 | 3 | 10 | 5 |
| $\mathrm{C}(\mu \mathrm{F})$ | 3 | 2 | 0.5 | 2 |

1 $1,2,3,4$
2 $3,2=4,1$
3 $4,1=2,3$
4 $1,2=3,4$
AMU-2014
Current Electricity

153094 Which of the following acts as a circuit protection device?

1 Inductor
2 Switch
3 Fuse
4 Conductor
NEET National-2019
Current Electricity

153098 In the circuit shown, when the switch is closed, the capacitor charges with a time constant

1 $\mathrm{RC}$
2 $2 \mathrm{RC}$
3 $(1 / 2) \mathrm{RC}$
4 $\mathrm{RC} \ln 2$
BITSAT-2007
Current Electricity

153103 Assertion: A current continues to flow in super conducting coil even after switch is off.
Reason: Superconducting coils show Meissner effect.

1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason in not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Ans.(b)
Exp:B The assertion is true, even when the emf is switched off, the current continue to flow because its resistance becomes
Meissner effect vepals the magnetic field line from the interior of the superconductor.
AIIMS-2007
Join With Us for More Updates