JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II ELECTRICAL CIRCUITS Previous Question Paper (May/June - 2019 - R13)

Define node, a junction and a branch.

Summarize the classifications of Circuit elements.

Define the term RMS value and write RMS value of a sinusoidal alternating Quantity.

Define form factor and peak factor.

Define mutual inductance and self-inductance.

Find the resonant frequency in the ideal parallel LC circuit with L = 40mH and C = 0.01 mf.

Define loop, tree and cutest.

Define Duality of networks.

State Compensation theorem.

State Reciprocity theorem with an example.

Differentiate between independent and dependent sources and draw their circuit representation.

Obtain the relationship between star to delta conversion.

Determine the current through each resistor in the circuit shown in figure 1.

Find the current I supplied by the battery of the Figure 2 through delta/star transformation.

Derive R.M.S value and Average value for the voltage waveform shown in figure 3.

The impedances of a parallel circuit are Z1=(4+j6)Ω and Z2=(8-j6)Ω. If the applied voltage is 120V, find i) current and power factor of each branch ii) overall current and power factor of the circuit iii) Power Consumed by each impedance. Draw phasor diagram.

Explain the concept of complex power. What is the physical interpretation of real power and reactive power and derive their expressions for sinusoidal excitation.

Determine RMS value, Average value, Form Factor and Peak Factor of output current waveform of a half wave rectifier.

For a series RL circuit, obtain the locus diagram of current as inductance is changed form 0 to ∞ when the applied voltage is constant.

A RLC series circuit consists of R=50Ω, L=0.16H and C= 4µF. Calculate resonant frequency, quality factor, band width and half power frequencies.

Explain the terms self inductance, mutual inductance and coefficient of coupling as applied to a magnetic circuit. With usual notation, establish the relationship between mutual inductance, self inductance and coefficient of coupling.

State and explain Faraday’s law of electromagnetic induction. Distinguish between self and mutual induced voltages.

Draw a suitable tree and dual network for the following network. Use general loop analysis to find i0 in the circuit shown in Figure 4.

For the given network graph shown in figure 5, write down the basic Tieset matrix, taking the tree consisting of edges 2,4 and 5.

Draw the dual of the network shown in figure 6.

Construct the incidence matrix for the graph shown in figure 7.

State and explain reciprocity theorem with an example.

Use the Thevenin equivalent of the network shown in Figure 8 to find the value of R which will receive maximum power. Find also this power.

A load of (20-jx2) is supplied from a source of 10V rms and internal impedance of (10+j20)Ω. Find the value of x2 for maximum power transfer and also find the maximum power.

Using the superposition theorem, determine the voltage drop and current across the resistor 3.3 kΩ in the circuit shown in figure 9.