1. | resistive circuit | 2. | \({LC}\) circuit |
3. | inductive circuit | 4. | capacitive circuit |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn AC source given by \(V=V_m\sin\omega t\) is connected to a pure inductor \(L\) in a circuit and \(I_m\) is the peak value of the AC current. The instantaneous power supplied to the inductor is:
1. \(\dfrac{V_mI_m}{2}\mathrm{sin}(2\omega t)\)
2. \(-\dfrac{V_mI_m}{2}\mathrm{sin}(2\omega t)\)
3. \({V_mI_m}\mathrm{sin}^{2}(\omega t)\)
4. \(-{V_mI_m}\mathrm{sin}^{2}(\omega t)\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn AC voltage source is connected to a series \(LCR\) circuit. When \(L\) is removed from the circuit, the phase difference between current and voltage is \(\dfrac{\pi}{3}\). If \(C\) is instead removed from the circuit, the phase difference is again \(\dfrac{\pi}{3}\) between current and voltage. The power factor of the circuit is:
1. \(0.5\)
2. \(1.0\)
3. \(-1.0\)
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
An inductor of \(20~\text{mH}\), a capacitor of \(100~\mu \text{F}\), and a resistor of \(50~\Omega\) are connected in series across a source of emf, \(V=10 \sin (314 t)\). What is the power loss in this circuit?
1. \( 0.79 ~\text{W} \)
2. \( 0.43 ~\text{W} \)
3. \( 2.74 ~\text{W} \)
4. \( 1.13 ~\text{W}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe potential differences across the resistance, capacitance, and inductance are \(80~\text{V}\), \(40~\text{V}\) and \(100~\text{V}\) respectively in an \(LCR\) circuit. The power factor of this circuit is:
1. \(0.4\)
2. \(0.5\)
3. \(0.8\)
4. \(1.0\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | over a full cycle, the capacitor \(C\) does not consume any energy from the voltage source. |
2. | current \(I(t)\) is in phase with voltage \(V(t)\). |
3. | current \(I(t)\) leads voltage \(V(t)\) by \(180^{\circ}\). |
4. | current \(I(t)\), lags voltage \(V(t)\) by \(90^{\circ}\). |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \(0.67~\text{W}\) | 2. | \(0.76~\text{W}\) |
3. | \(0.89~\text{W}\) | 4. | \(0.51~\text{W}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA resistance \(R\) draws power \(P\) when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes \(Z\), the power drawn will be:
1. | \(P\Big({\large\frac{R}{Z}}\Big)^2\) | 2. | \(P\sqrt{\large\frac{R}{Z}}\) |
3. | \(P\Big({\large\frac{R}{Z}}\Big)\) | 4. | \(P\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn an electrical circuit \(R,\) \(L,\) \(C\) and an \(\mathrm{AB}\) voltage source are all connected in series. When \(L\) is removed from the circuit, the phase difference between the voltage and the current in the circuit is \(\tan^{-1}\sqrt{3}\). If instead, \(C\) is removed from the circuit, the phase difference is again \(\tan^{-1}\sqrt{3}\). The power factor of the circuit is:
1. | \(1 / 2 \) | 2. | \(1 / \sqrt{2} \) |
3. | \(1 \) | 4. | \(\sqrt{3} / 2\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \( \frac{\sqrt{3}}{4} \) | 2. | \( \frac{1}{2} \) |
3. | \( \frac{1}{8} \) | 4. | \( \frac{1}{4}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology