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Three similar coils, connected in star, take a total power of 1.5 kW at a p.f. of 0.2 lagging from a three phase, 440 V, 50 Hz Supply. Calculate the resistance and inductance of each coil.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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33k
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Draw Phasor Diagram of single phase transformer on resistive load (unity power factor) and inductive load (lagging power factor).
circuit transmission lines updated 4.9 years ago by teamques10 ★ 70k
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5.2k
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Derive emf equation for single phase transformer.
circuit transmission lines updated 4.9 years ago by teamques10 ★ 70k
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740
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Define the equation for resonance frequency (fr) in parallel resonance circuit.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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An alternating voltage is given by V = 141.4 sin 314t. Find (i) Frequency (ii) RMS Values (iii) Average Value (iv) Instantaneous value of voltage at t = 3msec.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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930
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1
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State and explain maximum power transfer theorem
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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2.1k
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1
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Draw and explain Half wave rectifier with appropriate waveforms.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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601
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1
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Draw and explain Output characteristics of transistor in CE configuration.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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578
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1
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What is the function of filter in rectifier circuits. Explain with appropriate waveforms.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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3.6k
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1
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Define Ripple Factor and Voltage regulation for rectifier circuits.
industrial electronics updated 4.9 years ago by teamques10 ★ 70k
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1
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1.4k
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1
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State the working principle of transformer and derive the expression for emf induced.
circuit transmission lines updated 4.9 years ago by teamques10 ★ 70k
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798
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1
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Draw a phasor diagram with 3-phase star connected load with lagging power factor.
circuit transmission lines updated 4.9 years ago by teamques10 ★ 70k
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566
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Give the comparison between series and parallel resonance circuits.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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2.7k
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Derive the condition for maximum power transfer through the network.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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718
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Derive condition for maximum efficiency of a trransformer. Also deive equation for load at maximum efficiency.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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545
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1
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With proper phase diagrams, explain behaviour of a pure capacitor ina AC circuit.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1
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1.3k
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1
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Explain the circuit diagram and waveforms of Bridge rectifier
basic electrical engineering updated 4.9 years ago by teamques10 ★ 70k
0
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1
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625
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1
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Find the value of circuit elements and reactive voltampere drawn for a balanced 3 phase load connected in delta and draws a power 12k W at 440V. The power factor is 0.7 leading.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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1
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591
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1
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Draw and explain circuit diagram for half wave rectifier.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1
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576
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1
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Derive the condition for resonance in a series circuit.
basic electrical engineering updated 4.9 years ago by teamques10 ★ 70k
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646
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1
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A 3 phase, 10 KVA lead has power factor of 0.342.The power is measured by two wattmeter method. Find the reading of each wattmeter when. (i) Power factor is leading
analog electronics updated 4.9 years ago by teamques10 ★ 70k
0
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585
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1
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What is function of filter in rectifier circuit ? Draw of rectifire with inductor filter.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
0
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1
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2.8k
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1
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Draw phasor diagram of single phase transformer on resistive load [Unity power factor] and inductive load [lagging power factor].
circuit transmission lines updated 4.9 years ago by teamques10 ★ 70k
0
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1
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704
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1
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What are the losses in the transformer? Explain why the rating of transformer in KVA not in KW.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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2.7k
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1
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Three identical coils each [4.2-j5.6] ohm are connected in star Across 415 V, 3 Phase, 50Hz supply. Deterine (i) Vph (ii) Iph (iii) Power factor.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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