exam 3 ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
The alternating current in wide use in homes in North 7200 Times
America is 60 cycles per second, or 60 Hz. How many
times per minute does this current reverse its direction of
travel?
If you load up a curcuit in your home with too many parallel
devices, like lightbulbs or stereos, in ____ , then you
can overload the curcuit and trip a circuit breaker or blow
a fuse.
Which of these is an electronic instrument that can plot An oscilloscope
voltage as it varies with time?
Electrostatic precepitators can effectively remove most particulates
of which of the following air pollutants from a smoke
stack?
A negatively charged rod is brought close to an uncharged
uncharged electroscope. While the rod is close one's
finger touches the far side of the metal ball on the
electroscope. After the charged rod has been removed
the finger is removed. The electroscope is
Compared to the magnitude of the charge on a proton, exactly the same
the magnitude of the electrical charge carried by an
electron is
The charge of a proton is due to reasons physicists are not yet quite sure of, but they explain charge as a
property of the proton
In the water flow analogy with an electric circuit the voltage/volts
pressure in the fluid circuit is analogous to ___ in the
electric circuit.
A flashlight bulb typically has a small metallic button at insulate the metal button from the other contact point
one end, and this button is surrounded by ceramic
material. The chief purpose of the ceramic material is to
In many ways, an electric circuit is like the plumbing pressure
system in your home. The voltage on an electric circuit
corresponds to the_____ in a plumbing system.
An electric iron uses 8.0 A of current and has a power 17W
rating of 1100 W. The resistance of the iron is
, An iPod battery is rated at 3.7 volts and operates its iPod 3.2 Watts
and earbuds with a direct current of 865 milliamps. What
is the power rating of this iPod?
When you pay your electric bill, what are you paying for, the electrical energy you used the month before
exactly?
A dry cell battery is no longer useful when its ________ (two internal resistance
words) becomes large.
If a charge of -3 x 10-6 C were allowed to fall through a -1.5 x 10^-3 Joules
potential difference of +500 V, the change in potential
energy for the charge would be
Two charges of equal magnitude but opposite sign are 10 close to the positive charge
cm apart. The potential is largest
A capacitor consisting of two parallel plates separated by 2000 N/C, downward
2.0 cm has a potential of 40 V on the top plate and a
potential of 0 V on the bottom plate. The electric field in
the middle is
What would happen if you had a car made completely of The sensor would not notice you or your vehicle, and you'd be stuck at the
plastic, with no metal parts, and you drove over a vehicle red light
sensor embedded in the road surface?
A loop of wire is oriented in the magnetic field as shown there will be an induced current if the loop is moved either up or down
below (the plane of the loop is perpendicular to the
direction of the magnetic field). Which of the following is
true?
A current flowing through a long, straight wire causes a along concentric circles around the wire
magnetic field that points
A step-up transformer that doubles the input voltage is 60
designed to work with an input voltage that varies at 60
Hz. The frequency with which the output voltage varies is
_____ Hz.
A transformer is to be used to step down voltage from an 60
alternating current source from 220 V to 110 V. If the
primary has 120 turns, then the number of turns in the
secondary is
The alternating current in wide use in homes in North 7200 Times
America is 60 cycles per second, or 60 Hz. How many
times per minute does this current reverse its direction of
travel?
If you load up a curcuit in your home with too many parallel
devices, like lightbulbs or stereos, in ____ , then you
can overload the curcuit and trip a circuit breaker or blow
a fuse.
Which of these is an electronic instrument that can plot An oscilloscope
voltage as it varies with time?
Electrostatic precepitators can effectively remove most particulates
of which of the following air pollutants from a smoke
stack?
A negatively charged rod is brought close to an uncharged
uncharged electroscope. While the rod is close one's
finger touches the far side of the metal ball on the
electroscope. After the charged rod has been removed
the finger is removed. The electroscope is
Compared to the magnitude of the charge on a proton, exactly the same
the magnitude of the electrical charge carried by an
electron is
The charge of a proton is due to reasons physicists are not yet quite sure of, but they explain charge as a
property of the proton
In the water flow analogy with an electric circuit the voltage/volts
pressure in the fluid circuit is analogous to ___ in the
electric circuit.
A flashlight bulb typically has a small metallic button at insulate the metal button from the other contact point
one end, and this button is surrounded by ceramic
material. The chief purpose of the ceramic material is to
In many ways, an electric circuit is like the plumbing pressure
system in your home. The voltage on an electric circuit
corresponds to the_____ in a plumbing system.
An electric iron uses 8.0 A of current and has a power 17W
rating of 1100 W. The resistance of the iron is
, An iPod battery is rated at 3.7 volts and operates its iPod 3.2 Watts
and earbuds with a direct current of 865 milliamps. What
is the power rating of this iPod?
When you pay your electric bill, what are you paying for, the electrical energy you used the month before
exactly?
A dry cell battery is no longer useful when its ________ (two internal resistance
words) becomes large.
If a charge of -3 x 10-6 C were allowed to fall through a -1.5 x 10^-3 Joules
potential difference of +500 V, the change in potential
energy for the charge would be
Two charges of equal magnitude but opposite sign are 10 close to the positive charge
cm apart. The potential is largest
A capacitor consisting of two parallel plates separated by 2000 N/C, downward
2.0 cm has a potential of 40 V on the top plate and a
potential of 0 V on the bottom plate. The electric field in
the middle is
What would happen if you had a car made completely of The sensor would not notice you or your vehicle, and you'd be stuck at the
plastic, with no metal parts, and you drove over a vehicle red light
sensor embedded in the road surface?
A loop of wire is oriented in the magnetic field as shown there will be an induced current if the loop is moved either up or down
below (the plane of the loop is perpendicular to the
direction of the magnetic field). Which of the following is
true?
A current flowing through a long, straight wire causes a along concentric circles around the wire
magnetic field that points
A step-up transformer that doubles the input voltage is 60
designed to work with an input voltage that varies at 60
Hz. The frequency with which the output voltage varies is
_____ Hz.
A transformer is to be used to step down voltage from an 60
alternating current source from 220 V to 110 V. If the
primary has 120 turns, then the number of turns in the
secondary is
