- 1(current)
Q. No.A standard filament lamp consumes \(100~\text W\) when connected to \(200~\text V\) AC mains supply. The peak current through the bulb will be:
1. \(0.707~\text A\)
2. \(1~\text A\)
3. \(1.414~\text A\)
4. \(2~\text A\)
1. \(0.707~\text A\)
2. \(1~\text A\)
3. \(1.414~\text A\)
4. \(2~\text A\)
Subtopic: Â RMS & Average Values |
 75%
Level 2: 60%+
NEET - 2022
Hints
A \(40~\mu\text F\) capacitor is connected to a \(200~\text V,\) \(50~\text{Hz}\) AC supply. The RMS value of the current in the circuit is, nearly:
| 1. | \(2.05~\text A\) | 2. | \(2.5~\text A\) |
| 3. | \(25.1~\text A\) | 4. | \(1.7~\text A\) |
Subtopic: Â RMS & Average Values |
 72%
Level 2: 60%+
NEET - 2020
Hints
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The rms value of the potential difference \(V\) shown in the figure is:
| 1. | \(\dfrac{V_{0}}{\sqrt{3}}\) | 2. | \(V_{0}\) |
| 3. | \(\dfrac{V_{0}}{\sqrt{2}}\) | 4. | \(\dfrac{V_{0}}{2}\) |
Subtopic: Â RMS & Average Values |
 73%
Level 2: 60%+
AIPMT - 2011
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The peak voltage of the AC source is equal to:
| 1. | \(1 / \sqrt{2}\) times the rms value of the AC source. |
| 2. | the value of voltage supplied to the circuit. |
| 3. | the rms value of the AC source. |
| 4. | \(\sqrt{2}\) times the rms value of the AC source. |
Subtopic: Â RMS & Average Values |
 78%
Level 2: 60%+
NEET - 2022
Hints
An alternating current is given as \(i = i_1\cos\omega t- i_2 \sin \omega t.\) The value of rms current is given by:
1. \( \frac{1}{\sqrt{2}}\left(i_1+i_2\right) \)
2. \( \frac{1}{\sqrt{2}}\left(i_i+i_2\right)^2 \)
3. \( \frac{1}{\sqrt{2}}\left(i_1^2+i_2^2\right)^{1 / 2} \)
4. \( \frac{1}{2}\left(i_1^2+i_2^2\right)^{1 / 2}\)
1. \( \frac{1}{\sqrt{2}}\left(i_1+i_2\right) \)
2. \( \frac{1}{\sqrt{2}}\left(i_i+i_2\right)^2 \)
3. \( \frac{1}{\sqrt{2}}\left(i_1^2+i_2^2\right)^{1 / 2} \)
4. \( \frac{1}{2}\left(i_1^2+i_2^2\right)^{1 / 2}\)
Subtopic: Â RMS & Average Values |
 81%
Level 1: 80%+
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The time required for a \(50\text{ Hz}\) sinusoidal alternating current to change its value from zero to the rms value will be:
1. \(1 . 5 \times 10^{- 2}~\text{s}\)
2. \(2 . 5 \times 10^{- 3}~\text{s}\)
3. \(10^{- 1}~\text{s} \)
4. \(10^{- 6}~\text{s}\)
Subtopic: Â RMS & Average Values |
 79%
Level 2: 60%+
Hints
An alternating current in a circuit is given by; \(I=20\sin\left({{100}{\pi}{t}+{0.05}\pi}\right)~\text{A}\). The rms value and the frequency of the current respectively are:
1. \(10\) A and \(100\) Hz
2. \(10\) A and \(50\) Hz
3. \(10\sqrt{2}\) A and \(50\) Hz
4. \(10\sqrt{2}\) A and \(100\) Hz
1. \(10\) A and \(100\) Hz
2. \(10\) A and \(50\) Hz
3. \(10\sqrt{2}\) A and \(50\) Hz
4. \(10\sqrt{2}\) A and \(100\) Hz
Subtopic: Â RMS & Average Values |
 92%
Level 1: 80%+
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What reading would you expect of a square wave current, switching rapidly between \(+0.5~\text A\) and \(-0.5~\text A,\) when passed through an AC ammeter?
1. zero
2. \(0.5~\text A\)
3. \(0.25~\text A\)
4. \(1.0~\text A\)
1. zero
2. \(0.5~\text A\)
3. \(0.25~\text A\)
4. \(1.0~\text A\)
Subtopic: Â RMS & Average Values |
 52%
Level 3: 35%-60%
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