How does a fluorescent lamp produce light? correct answers Passing current through a narrow
tube of gas
How does an incandescent lamp produce light? correct answers Heating a thin piece of wire
What type of electric generator uses a commutator? correct answers DC
Which of the following statements explains why a metal-topped car is a safe shelter during a
thunderstorm? correct answers Lightning passes through the outside surface of the car.
Three 1.5 V electrochemical cells can each produce 0.5 K of current. What is the voltage and
total possible current when these cells are connected in parallel? correct answers 1.5 V, 1.5 A
How was the Leyden jar used to store electricity? correct answers Charge was stored on foil
lining the inside of a glass jar.
Which of the following is a drawback of an MHD generator? correct answers The flow velocity
must be extremely high.
Which of the following lamps is the most efficient? correct answers LED lamp
Which of the following statements describes how an electric motor works? correct answers An
oscillating magnetic field causes rotation.
In the following figure of an electric generator, why does the multi meter indicate that there is no
current? correct answers The loop is not cutting the lines of the flux.
Who built the first electrostatic generator? correct answers Otto van Guericke
, How does lightning form? correct answers Opposite charges accumulate in the clouds and on the
ground, causing an electrostatic discharge.
What is the most common type of electrostatic generator in use today? correct answers Van de
Graaff generator
The negative terminal of a voltaic cell is called the ________. correct answers Anode
The early device developed by Musschenbroek to store electric charge was the
_________________. correct answers Leyden jar
The first electric light suitable for household use was the _______________. correct answers
Incandescent lamp
To boost available voltage, electrochemical cells can be arranged in _____________. correct
answers Series
A device for protecting buildings and other structures from lightning strikes is a(n)
______________________. correct answers Lightning rod
The stationary magnet in an electric generator is the _______________. correct answers Field
magnet
An electric discharge lamp that passes a spark through a long tube of mercury vapor and argon
gas is a ___________________. correct answers Fluorescent lamp
The ability of magnetism to convert mechanical motion into electric current is called
____________________. correct answers Electromagnetic induction