Electrical Safety
What should you do before working on any electrical circuit?
Disconnect the power source
What formula relates voltage, current, and resistance?
V=IR
In which type of circuit does current divide?
Parallel
What value does a brown-black-red resistor represent?
1,000 Ω
What component limits current in a circuit?
Resistor
What PPE should be worn when cutting or stripping wires?
Safety glasses
If voltage increases and resistance stays the same, what happens to current?
It increases
In a series circuit, current is the _____ through all components.
Same
Which resistor band shows the multiplier?
Third band
What unit measures current?
Amps (A)
What should you do FIRST if a circuit sparks or smokes?
Shut off the power
If V = 12V and R = 6Ω, what is the current?
2A
Why are homes wired in parallel?
Devices work independently
What does a gold band indicate on a resistor?
±5% tolerance
What unit measures electrical power?
Watts (W)
Which situation increases shock risk?
Wet hands touching exposed wires
If V = 30V and I = 5A, what is the resistance?
6Ω
What is a mixed circuit?
A circuit with both series and parallel sections
What is the value of a blue-gray-brown resistor?
680 Ω
What component provides voltage to a circuit?
Battery/Power Supply
What should you do if a classmate is shocked?
Shut off power and alert the teacher
What unit is used to measure resistance?
Ohms (Ω)
Two 10Ω resistors in parallel have a total resistance of:
5Ω
What does tolerance tell you about a resistor?
How much the value can vary
Which tool is used to safely strip wire insulation?
Wire Strippers