EL100 FINAL REVIEW

🔌 Lab Basics

100

👉 Why must a circuit be de-energized before measuring resistance?

To prevent incorrect readings and protect the meter

200

👉 What does continuity testing check for?

A complete path (closed circuit)

300

What should you do if a component overheats or smells?

 Turn power OFF immediately

400

👉 Name TWO electrical safety rules

• Power OFF when building
• Double-check wiring
• Keep workspace clean
• Use correct components 

500

👉 Why is a closed circuit required?

So current can flow

📟 Multimeter Mastery

100

👉 Unit of voltage

: Volts

200

👉 Black lead goes to which terminal? t

COM (common) OR GND

300

👉 Voltage is measured in ______ (series or parallel)

Parallel

400

👉 What happens if you measure current in parallel?

You can short the circuit and damage the meter

500

👉 Why must resistance be measured across a component?

To isolate and measure only that component

🎨 Resistors & Color Code

100

👉 What does the gold OR SILVER band represent?

Tolerance

200

👉 What is the resistance of:
Brown – Black – Red – Gold

1kΩ (1000 Ω) ±5% 

300

👉 What does “203” mean on a chip resistor?

20,000 Ω (20kΩ) 

400

Why do resistors have tolerance?

Manufacturing variations

500

A resistor is labeled: Red – Violet – Brown – Gold
Find the resistance and tolerance

• 27 × 10¹ = 270 Ω

• ±5%

⚡ Circuit Analysi

100

👉 Ohm’s Law formula

V=IR

200

👉 In a series circuit, what stays the same?

Current

300

n a parallel circuit, what stays the same?

Voltage

400

👉 A node has 10A entering and 6A leaving one branch. Find the other branch current.

4A

500

👉 A 12V source is connected to two parallel resistors: 6Ω and 3Ω
Find total current

RT = 2 OHM

IT = V/RT = 6A

🔋 Capacitors & RC Circuits

100

A capacitor stores ______

Energy

200

👉 Long leg of a capacitor is ______

Positive

300

👉 What does τ (tau) represent?

Time constant

400

👉 Formula for time constant

τ = RC

500

👉 What happens to charging time if resistance increases?

 It increases (slower charging)