Introduction to Electrical Engineering (past papers) PYQs

Explain the following: (a) Linear and non-linear elements (b) Active and passive elements (c) Unilateral and bilateral elements

For the circuit as shown in Fig. 1, find the current through $6\,\Omega$ resistor using Norton' s theorem.

Derive expressions for star to delta transformation of a resistive network.

An inductive coil having resistance of $8\,\Omega$ and inductance of 80 mH, is connected in series with a capacitance of $100\,\mu\mathrm F$ across 150 V, 50 Hz supply as shown in Fig. 2. Calculate: (a) the current (b) the power factor (c) the voltage drop across the coil.