Electric
An electric current can be measured by this instrument:
ammeter
The man who eventually won the AC-DC war was __________.
George Westinghouse
A _____ is a device that uses a smaller current to control a larger current.
relay switch
Transformers will not work on _____________ electrical systems.
DC
Most of the energy used by an incandescent light bulb is converted to ______.
heat
Current flowing through a coil of insulated wire wound on an iron core creates a(n) _____.
electromagnet
In a simple DC motor, the ______ reverses the current every half revolution of the loop.
armature
The overhead light in your car goes out; you should check the car's _______.
fuse
Neglecting losses in a transformer, its input and output ______ are equal.
power
The first electric light used a(n) _____.
arc
As an electric current forms an electric field, a(n) ______ is created in the phenomenon of electromagnetism.
magnetic field
The wire loops in a simple DC motor are wound around an iron core called an armature. Constant rotation of the armature provides ________ to operate mechanical devices.
torque
The protective device that switches off if the circuit overloads is a _____.
circuit breaker
Energy loss in power lines is primarily due to ___________.
resistance
Who invented the first practical and commercially feasible light bulb (1879)?
Thomas Edison
An electric current produces a magnetic field because of ______.
induction
A DC motor’s magnet has a magnetic field that ___ the wire loop’s magnetic field, therefore causing the loop to rotate.
attracts
Use a GFCI protected outlet when using electrical devices in ______ conditions.
damp
How much a transformer steps-up or steps-down the voltage is determined by the ________.
turns ratio
Hot rock and hot water close to the earth's surface can be tapped to generate electricity through the process of _____.
Geothermal Energy
To turn a coil of wire into a magnet, run a(n) ______ through it.
electric current
The discovery by Nikola Tesla that out-of-phase alternating currents caused _______ is considered one of the 10 greatest scientific discoveries.
rotation
The inventor of the relay was _____.
Joseph Henry
A musician flies from England to Canada where the voltage is 120 VAC. Her amplifier operates on 240 VAC. In order to use her amp, she uses a step-down transformer that has _____ turns on the primary coil and 600 turns on the secondary coil.
300
Photoelectricity is generated by the kinetic energy of falling water to drive electric generators.
Hydroelectric power