- 1(current)
Q. No.A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an AC source. The brightness of the bulb decreases when:
| 1. | number of turns in the coil is reduced. |
| 2. | a capacitance of reactance \(X_C = X_L\) is included in the same circuit. |
| 3. | an iron rod is inserted in the coil. |
| 4. | frequency of the AC source is decreased. |
Subtopic: Â Self - Inductance |
 68%
Level 2: 60%+
AIPMT - 2013
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A current of \(2.5~\text A\) flows through a coil of inductance \(5~\text H.\) The magnetic flux linked with the coil is:
1. \(0.5~\text{Wb}\)
2. \(12.5~\text{Wb}\)
3. zero
4. \(2~\text{Wb}\)
1. \(0.5~\text{Wb}\)
2. \(12.5~\text{Wb}\)
3. zero
4. \(2~\text{Wb}\)
Subtopic: Â Self - Inductance |
 84%
Level 1: 80%+
NEET - 2013
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The current \((I)\) in the inductance is varying with time \((t)\) according to the plot shown in the figure.
Which one of the following is the correct variation of voltage with time in the coil?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Â Self - Inductance |
 74%
Level 2: 60%+
AIPMT - 2012
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A long solenoid has \(500\) turns. When a current of \(2 ~\text{A}\) is passed through it, the resulting magnetic flux linked with each turn of the solenoid is \(4\times 10^{-3} ~\text{Wb}\). The self-inductance of the solenoid is:
1. \(2.5 ~\text{H}\)
2. \(2.0 ~\text{H}\)
3. \(1.0 ~\text{H}\)
4. \(4.0 ~\text{H}\)
1. \(2.5 ~\text{H}\)
2. \(2.0 ~\text{H}\)
3. \(1.0 ~\text{H}\)
4. \(4.0 ~\text{H}\)
Subtopic: Â Self - Inductance |
 80%
Level 1: 80%+
AIPMT - 2008
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For a coil having \(L=2~\text{mH},\) the current flow through it is \(I=t^2e^{-t}.\) The time at which emf becomes zero is:
1. \(2\) s
2. \(1\) s
3. \(4\) s
4. \(3\) s
Subtopic: Â Self - Inductance |
 59%
Level 3: 35%-60%
AIPMT - 2001
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For an inductor coil, \(L = 0.04 ~\text{H}\), the work done by a source to establish a current of \(5~\text{A}\) in it is:
1. \(0.5~\text{J}\)
2. \(1.00~\text{J}\)
3. \(100~\text{J}\)
4. \(20~\text{J}\)
Subtopic: Â Self - Inductance |
Level 3: 35%-60%
AIPMT - 1999
Hints
- 1(current)
Q. No.
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