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