Max Marks: 100
Time: 3 Hours
Section A
Answer the following questions.
1. Define electromotive force (EMF) and explain how it differs from voltage. (10 marks)
2. State and prove Ohm's Law. (10 marks)
3. Explain the concept of Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL). (10 marks)
4. Derive the expression for the equivalent resistance of two resistors connected in series and in parallel. (10 marks)
5. Explain the concept of a capacitor and its capacitance. Describe the factors that affect capacitance. (10 marks)
Section B
Solve the following problems.
6. Calculate the current flowing through a circuit with a resistance of 10Ω when a voltage of 20V is applied across it. (10 marks)
7. Determine the equivalent resistance of three resistors with resistances 10Ω, 15Ω, and 20Ω connected in series. (10 marks)
8. Calculate the total capacitance of three capacitors with capacitances 10µF, 20µF, and 30µF connected in parallel. (10 marks)
9. A coil of wire has an inductance of 0.1H. Calculate the energy stored in the coil when a current of 2A flows through it. (10 marks)
10. A transformer has a primary coil with 100 turns and a secondary coil with 500 turns. If the primary coil is connected to a voltage source of 120V, determine the voltage across the secondary coil. (10 marks)