- 1(current)
Q. No.Given below are two statements.
| Assertion (A): | When a current \(I=(3+4 \sin \omega t)\) flows in a wire, then the reading of a dc ammeter connected in series is \(4\) units. |
| Reason (R): | A dc ammeter measures only the value of the current amplitude. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â AC vs DC |
 59%
From NCERT
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A non-ideal coil, a capacitor and an AC source of rms voltage \(24\) V are connected in series. By varying the frequency of the source, a maximum rms current of \(6\) A is observed. If the coil is connected to a DC battery of emf \(12\) V and internal resistance \(2\) \(\Omega,\) the current in it in steady-state will be:
1. \(1\) A
2. \(1.5\) A
3. \(2\) A
4. \(2.4\) A
1. \(1\) A
2. \(1.5\) A
3. \(2\) A
4. \(2.4\) A
Subtopic: Â AC vs DC |
 72%
From NCERT
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A direct current of \(2~\text{A}\) and an alternating current having peak value \(2~\text{A}\) flow through two identical resistances at the same time. The ratio of heat produced in the two resistance will be:
1. \(1:1\)
2. \(1:2\)
3. \(2:1\)
4. \(4:1\)
Subtopic: Â AC vs DC |
 65%
From NCERT
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Given that the current \(i_1=3A \sin \omega t\) and the current \(i_2=4A \cos \omega t,\) what will be the expression for the current \(i_3\)?
1. \(5 A \sin \left(\omega t+53^{\circ}\right) \)
2. \(5 A \sin \left(\omega t+37^{\circ}\right) \)
3. \(5 A \sin \left(\omega t+45^{\circ}\right) \)
4. \( 5 A \sin \left(\omega t+30^{\circ}\right)\)
Subtopic: Â AC vs DC |
 58%
From NCERT
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The line that draws power supply to your house from the street has
Choose the correct options:
1. (b), (c)
2. (a), (d)
3. (b), (d)
4. (a), (c)
| (a) | zero average current |
| (b) | \(220\) V average voltage |
| (c) | voltage and current out of phase by \(90^\circ\) |
| (d) | voltage and current possibly differing in phase \(\phi\) such that \(|\phi|<\dfrac \pi 2\) |
Choose the correct options:
1. (b), (c)
2. (a), (d)
3. (b), (d)
4. (a), (c)
Subtopic: Â AC vs DC |
From NCERT
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- 1(current)
Q. No.
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