📚 Part 1: Multiple Choice Questions

1. What is a capacitor?

A device that controls current flow

A device that stores electric charge

A device that converts AC to DC

A device that measures voltage

2. The unit of capacitance is:

Ohm (Ω)

Volt (V)

Farad (F)

Ampere (A)

3. In an RC circuit, what role does the resistor play?

Stores energy as an electric field

Controls the rate of current flow

Provides the voltage source

Converts electrical energy to heat only

4. Which everyday devices commonly use capacitors? (Select all that apply)

Mobile phones

Camera flashes

Power supplies

Light bulbs

5. The time constant (τ) of an RC circuit is calculated as:

R + C

R - C

R × C

R ÷ C

✏️ Part 2: Short Answers and Circuit Analysis

6. Complete the following sentence:

A capacitor consists of two _____________ separated by an _____________ called a dielectric.

7. Explain in your own words how resistance and capacitance work together in an RC circuit:

8. In the space below, draw the circuit symbol for:

a) A resistor:

b) A capacitor:

9. A capacitor charges to approximately ____% of the supply voltage after one time constant (τ).

10. Give two real-world applications where RC circuits are important and briefly explain why:

🔬 Part 3: Practical Application

11. You are building an RC circuit with a 100Ω resistor and a 1000μF capacitor. Calculate the time constant and show your working:

12. Predict what would happen to the charging time if you:

a) Doubled the resistance: _________________________________

b) Halved the capacitance: _________________________________

RC Circuit Fundamentals

RC Circuit Fundamentals

📚 Part 1: Multiple Choice Questions

✏️ Part 2: Short Answers and Circuit Analysis

🔬 Part 3: Practical Application

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