BT-104 (GS) – Basic Electrical and Electronics Engineering

State the steps to solve the Thevenin's Theorem. An Electric iron is rated 1000W, 240V. Find the current drawn & resistance of the heating element.

Find the current through 3 Ω resistor using superposition theorem in given figure.

Explain about Star and Delta connected three phase balanced circuits.

A series RLC circuit containing a resistance of 12Ω, an inductance of 0.15H and a capacitor of 100μF are connected in series across a 100V, 50Hz supply. Calculate the total circuit impedance, the circuits' current, power factor and draw the voltage phasor diagram.

Derive expression for the coefficient of: (i) Self-inductance for a solenoid coil (ii) Mutual inductance for a pair of closely wound solenoid coils.

Discuss some of the magnetization characteristics of ferromagnetic materials.

With a neat circuit diagram and explain the construction and principle of operation of DC Motor.

A three phase 50Hz, 2 pole induction motor has a full speed of 2860 rpm. What is the (i) synchronous speed (ii) slip of the induction motor (iii) rotor emf frequency?

Define α and β with respect to BJT and derive the relationship between them. For a transistor circuit having α = 0.98, ICBO = 5 μA and IB = 100 μA, find IC and IE.

When three balanced impedances are connected in delta across a 3 phase 400 V, 50 Hz supply the line current drawn is 20 A at a lagging p.f. of 0.3. Determine the value of the impedance connected in each phase.

Determine the equivalent resistance between terminals A and B in the given figure.

Draw the circuit of an S-R flip flop using NAND gates. Explain it.

State and Prove Demorgan's theorem.

Explain about open circuit and short circuit test.

Write technical short note on any two of the following: (i) Voltage and current sources (ii) Applications of DC machine (iii) Half and Full adder circuits