3.2 Exam Introduction to Electrical Circuits

An electrical device that operates by chemically creating a potential difference between two points is a

battery

An electron repels a(n)

electron

Which of the following is considered a good semiconductor?

Silicon

Materials with electrical characteristics that fall between those of insulators and conductors are considered

semiconductors

Which of the following is used to step voltage up for transmission?

Transformer

Magnetic lines of force are also referred to as

flux lines

Voltage is defined as the

difference of potential

Coulombs are a measure of

electric charge

What is the circuit current if the voltage source is 120V and the resistance is 10 ohms?

12A

A measurement of 1,000 mils is equal to

1 inch

Copper is considered a(n)

conductor

What is the applied voltage if the current in a circuit is 48 amps and the resistance is 10 ohms?

480V

A resistor has no fourth band. This indicates that the resistor tolerance is

20%

If a circuit has 20 amps of current and an applied voltage of 240 volts, the resistance is

12Ω

A 10-ohm resistor and a 15-ohm resistor are connected in parallel. What is the total resistance of these two resistors?

6Ω

If two 5-ohm resistors are connected in series, what is the total resistance of these resistors?

10Ω

Resistance is measured using a(n)

ohmmeter

In a parallel circuit, the voltage drop

is the same across all loads

If the resistance of a circuit is 20 ohms and the current is 15 amps, the power in watts is

4,500W

A circuit has a source voltage of 120V and a current of 10A. What is the power in watts?

1,200W