Electrical Circuits Exam Prep
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Electrical Circuits Exam Prep
English 10 leveled MCQs Free
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10 marks Long answer
In a series RLC circuit, R=1 Ohm, L=0.25H and C=1.33F. A dc voltage of 10V is applied at t=0. Obtain i(t)?
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The current \( i(t) \) can be obtained by solving the differential equation: \( L rac{di}{dt} + Ri + rac{1}{C} \int i dt = V \).
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10 marks Long answer
Develop the expression for the RMS value, average value, form factor and peak factor the sinusoidal wave form.
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The RMS value is \( V_{rms} = rac{V_{peak}}{\sqrt{2}} \), average value is \( V_{avg} = rac{2V_{peak}}{\pi} \), form factor is \( rac{V_{rms}}{V_{avg}} \), and peak factor is \( rac{V_{peak}}{V_{rms}} \).
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4 marks Medium answer
In a series RLC circuit, R=6 ohms, L=2 H, C=2 F. A DC voltage of 50 V is applied at t=0. Obtain the expression for i(t) using differential equation approach.
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The expression for \( i(t) \) is derived from \( L rac{di}{dt} + Ri + rac{1}{C} \int i dt = V \) with initial conditions.
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4 marks Medium answer
Find the current in 2 ohm resistor of the Fig. shown below using Source Transformation.
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Use source transformation to convert the circuit and apply Ohm's law to find the current.
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4 marks Medium answer
Derive the expression for Bandwidth of a series RLC circuit.
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The bandwidth \( BW \) is given by \( BW = rac{R}{2\pi L} \) for a series RLC circuit.
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2 marks Short answer
Explain the conversion of star to delta and vice-versa
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The conversion involves using the formulas: \( R_{AB} = rac{R_A R_B}{R_A + R_B + R_C} \) and similar for other pairs.
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2 marks Short answer
Define form factor?
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Form factor is the ratio of the RMS value to the average value of a waveform.
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2 marks Short answer
Write the condition for symmetry in h-parameters?
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The condition for symmetry in h-parameters is \( h_{21} = h_{12} \).
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2 marks Short answer
Name any two applications of DC series generators?
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Applications include electric traction systems and battery charging.
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2 marks Short answer
What is the importance of OC and SC tests?
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OC and SC tests help determine the equivalent circuit parameters of transformers.
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