In an ac circuit, the current is given by \(i=5\sin(100t-\frac{\pi}{2})\) and the ac potential is \(V =200\sin(100 t)\) volt.
The power consumption is:
1. \(20\) W
2. \(40\) W
3. \(1000\) W
4. \(0\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \(484~\text{W}\) | 2. | \(848~\text{W}\) |
3. | \(400~\text{W}\) | 4. | \(786~\text{W}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA coil of inductive reactance of \(31~\Omega\) has a resistance of \(8~\Omega\). It is placed in series with a condenser of capacitive reactance \(25~\Omega\). The combination is connected to an AC source of \(110\) V. The power factor of the circuit is:
1. \(0.56\)
2. \(0.64\)
3. \(0.80\)
4. \(0.33\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
The power factor of the given circuit is:
1. | \(1 \over 2\) | 2. | \(1 \over \sqrt2\) |
3. | \(\sqrt3 \over 2\) | 4. | \(0\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | zero | 2. | \(\dfrac{1}{2}\) |
3. | \(\dfrac{1}{\sqrt{2}}\) | 4. | \(1\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe potential differences across the resistance, capacitance and inductance are \(80\) V, \(40\) V and \(100\) V respectively in an \(LCR\) circuit.
What is the power factor of this circuit?
1. \(0.4\)
2. \(0.5\)
3. \(0.8\)
4. \(1.0\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn inductor of inductance \(L\) and resistor of resistance \(R\) are joined in series and connected by a source of frequency \(\omega\). The power dissipated in the circuit is:
1. | \(\dfrac{\left( R^{2} +\omega^{2} L^{2} \right)}{V}\) | 2. | \(\dfrac{V^{2} R}{\left(R^{2} + \omega^{2} L^{2} \right)}\) |
3. | \(\dfrac{V}{\left(R^{2} + \omega^{2} L^{2}\right)}\) | 4. | \(\dfrac{\sqrt{R^{2} + \omega^{2} L^{2}}}{V^{2}}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \(20\) W | 2. | \(30\) W |
3. | \(10\) W | 4. | \(40\) W |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \(2500\) W | 2. | \(250\) W |
3. | \(5000\) W | 4. | \(4000\) W |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA circuit consists of \(3\) ohms of resistance and \(4\) ohms of reactance. The power factor of the circuit is:
1. | \(0.4\) | 2. | \(0.6\) |
3. | \(0.8\) | 4 | \(1.0\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology