JNTU B.Tech I Year FUNDAMENTALS OF ELECTRICAL AND ELECTRONICS ENGINEERING Previous Question Paper (March/April - 2023 - R22)

Explain Kirchhoff’s voltage law.

State ohms law.

Define alternating quantity.

Write the formula for inductive reactance X_L and capacitive reactance X_C.

Define slip of an induction motor.

Explain the difference in principle of DC Generator and DC Motor.

Define peak inverse voltage of diode.

What is meant by Transformer utilization factor?

Mention the names of terminals of BJT.

Define current gain (α) of a transistor.

Determine the current in branch A-B by using KVL.

Obtain the Equivalent Resistance when two resistors R1 and R2 are connected in Series and Parallel respectively.

Calculate the voltage drop across each resistors, also determine the current supplied from the battery.

Explain about Energy Sources.

Find the equivalent resistance for the circuit where all resistors have same value R.

Determine the mesh currents for the given circuit.

The impedances of series circuit are Z1= (6+j8) ohms and Z2 = (8-j6) ohms. If the applied voltage is 120V, find total impedance, current and power factor.

Derive an expression for the current and impedance for a series RC circuit excited by a Sinusoidally alternating voltage. Draw the phasor diagram.

An alternating current is expressed as I = 14.14 sin 314t. Determine (i) Maximum current (ii) RMS current (iii) Frequency

A resistor of 50Ω and inductance of 100mH are connected in series across 200V, 50Hz supply. Determine (i) Impedance (ii) current flowing through the circuit. Also draw the phasor diagram.

Derive an expression for Form Factor of sine wave form.

Explain about the working principle of a D.C generator.

Draw the constructional diagram of a single –phase transformer.

Explain working principle of an Alternator.

Classify types of D.C motors. Draw their schematic diagrams.

What is the significance of back emf of motors?

Write the applications of three phase induction motors.

Explain the working of Bridge rectifier. Give the expressions for RMS current, PIV, ripple factor.

Explain the operation of forward biased and reverse biased PN junction Diode.

With suitable diagrams, Obtain expressions for VDC, IDC, Vrms and Irms of center-tapped full wave rectifier.

Explain about the effect of temperature on diode characteristics.

Among CE, CB and CC configurations which is most popular? Why?

Explain the constructional details of a transistor.

If β of a transistor is 98, Ic= 4.5mA, then calculate base current.

Explain working principle of NPN Transistor.

If α of a transistor is 0.9, calculate β.

Derive the relationship between α & β of transistor.