Technician A says current is the same everywhere in a series circuit. Technician B says current is the same in each branch of a parallel circuit. Who is right?
A only
Neither
B only
Both
Why are many automotive circuits frame-ground circuits?
Using the vehicle frame for ground saves wiring because a return wire does not have to be used to carry current back to the power source.
In what way is a parallel circuit different from a series circuit?
A parallel circuit has more than one path for current flow. A series circuit has only one path for current flow.
If a circuit has a current of 3 A and a resistance of 5 Ω, how much voltage is applied to the circuit?
15 V
The ____________________________ is the unit of measurement for electric power.
Watt
If resistance rises what happens to current?
Current goes down
Nothing
Current goes up
True or False? An ammeter is a device that measures resistance of a circuit.
False
R represents ______________________.
Current
Ohms
Watts
Voltage
What does DVOM stand for?
Digital Volt Ohm Meter
Which of the following is not a common type of electric circuit?
Series- Parallel Circuit
Series Circuit
Parallel Circuit
Series-ground circuit.
If voltage rises what a happens to current?
Current goes down
Nothing
Current goes up
If voltage drops what happens to current?
Current goes up
Current goes down
Nothing
Technician A says a change in circuit resistance will change the amount of current in the circuit. Technician B says a change in circuit voltage will change the amount of current in the circuit. Who is right?
Both
B only
Neither
A only
A 12-volt circuit has a resistance of 2 ohms. How much current is in the circuit?
5 amps
8 amps
4 amps
6 amps
Write the formulas that express the relationships between voltage, current, and resistance in a circuit.
E = I × R, I = E ÷ R, R = E ÷ I
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