Electrical 2 of 5 study guide

An electrical circuit has a voltage of 50 V and a resistance of 5 Ω. What is the value of current?

10 A

An electric circuit has a resistance of 20 Ω. The current is measured to be 6 A. How many volts are applied to the circuit?

120

A toaster is listed as 1560 W. When it is plugged into a 120 V circuit and starts to make toast, how many amperes will it draw?

13

An electrical device is listed as 3,000 watts. Approximately how many horsepower is this?

4

An electric motor is running on 120 V. The current is measured to be 2 A. How many ohms of resistance is the motor?

60

In normal operation, current flows through the hot, grounding, and neutral conductors.

False

The statement "in a DC circuit, the current is directly proportional to voltage and inversely proportional to resistance" is know as _____ law.

Ohm's

The grounding conductor is used to help prevent a shock hazard in the event that the ungrounded, or hot, conductor comes in contact with the case or frame of the appliance.

True

The grounding prong of a plug should never be cut off or bypassed.

True

Voltage pushes current through a wire, but voltage cannot flow through a wire.

True

_____ is also referred to as electromotive force (EMF).

Voltage

The _____ is equal to one coulomb per second.

ampere

A complete circuit is often referred to as a(n) _____ circuit.

closed

The neutral conductor is also referred to as the _____ conductor.

grounded

The velocity of AC through a conductor is _____ the speed of light because magnetic fields travel more slowly in material dielectrics than they do through free air.

less than

The unit of resistance to current flow is the _____.

ohm

Opposition to current flow is called _____.

resistance

A(n) _____ circuit generally occurs when the conductors leading from and back to the power source become connected.

short

The unit of electrical "pressure" that causes current to flow is called the _____.

volt

The _____ is used to measure electrical power being used in a circuit.

watt

If a circuit is open, current _____ flow.

will not