# Basic Electrical Engineering(3110005)

BE | Semester 1  Unit : AC Circuits

## Q2 (b) Winter-2019   Compare series and parallel resonance in ac circuit.

Unit : AC Circuits

## Q2 (c) Winter-2019   A single-phase R-L-C circuit having resistance of 8 $\mathrm{\Omega }$ , inductance of 80mH and capacitance of 100µF is connected across single phase ac 150 V, 50Hz supply. Calculate the current, power factor and voltage drop across inductance and capacitance.

Unit : AC Circuits

## Q3 (a) Winter-2019   Define the following terms in connection with AC waveforms : - (1) Q-Factor (2) Power Factor (3) Form factor.

Unit : AC Circuits

## Q3 (b) Winter-2019   Draw impedance triangle, Voltage triangle, Power triangle for single phase R-L series circuit.

Unit : AC Circuits

## Q3 (c) Winter-2019   Derive the relationship between Phase and Line values of voltages and currents in case of 3-phase Star- connection.

Unit : AC Circuits

## Q3 (a) Winter-2019   Define the terms: - 1. Real power 2. Reactive power 3. Apparent power.

Unit : AC Circuits

## Q3 (c) Winter-2019   With neat circuit diagram and a phasor diagram prove that two-watt meters are sufficient to measure total power in 3-phase system.

Unit : AC Circuits