Physics Electricity

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1.
3 points
Use Coulomb's law to calculate the value and sign of an unknown charge (q2) if the first charge (q1) is +5.7 x 10-8 C and exerts a force of 12 N causing q2 to move 5.0 x 10-4 m towards it.
2.
3 points
Any object in which electric charge does not move freely is called a(n)
3.
3 points
A device which converts mechanical energy into electrical energy is called a
4.
3 points
The rate at which electric charge pass through a cross sectional area of a conductor is called.
5.
3 points
(refer to diagram #1 on the separate diagram sheet) In the diagram, q1 is a _______________ charge and q2 is a ______________ charge
6.
3 points
you rub a blue balloon on your head transferring electrons to the balloon. Suppose the blue balloon, which has a net negative charge, is brought near another red balloon hanging from a string. The red balloon moves away from the blue balloon. The red balloon must have a
7.
3 points
Conventional current is defined in terms of the flow of
8.
3 points
(refer to diagram #2 on the separate diagram sheet) A positive test charge placed at point B will have ___________ electrical potential energy than a charge placed at point A.
9.
3 points
Metal is an example of a
10.
3 points
The ampere (A) is the unit of
11.
3 points
A 1.5 volt battery is connected to a small light bulb with a resistance of 3.5 Ohms. What is the current in the bulb? (Use Ohm's Law)
12.
3 points
____________ charge carriers will always flow in the opposite direction of current
13.
3 points
Two conductors transfer the same amount of charge. One conductor is twice as long as the other conductor. The charge going through the long conductor will experience ___________ resistance than the shorter conductor
14.
3 points
A small electronic device is rated at 0.25 watts when connected to 120 volts. What is the resistance of this device? (use both Ohm's Law and electrical power equations.
15.
3 points
(refer to diagram #2 on the separate diagram sheet) A negative test charge placed at point B will have ___________ potential energy than if it were placed at point A.
16.
3 points
According to Coulomb's law if the distance between two positive charges is doubled the ________________ force between the charges will be _______
17.
3 points
Use Coulomb's law to find the distance between two charges that exert a repulsive force of 175 N on each other. The charges are +2.4 x 10-6 C and +4.3 x 10-6 C
18.
3 points
If electricity were compared to a water system where a pump was pushing water through a hose, a longer or a narrower hose would act as
19.
3 points
A typical color television draws 2.50 amperes of current when connected across a potential difference of 115.00 volts. What is the effective resistance of the television set? (use Ohm's Law)
20.
3 points
When charging by induction
21.
3 points
The rate at which charge carriers do work is called
22.
3 points
Which of the following is not an insulator?
23.
3 points
If electricity were compared to a water system where a pump was pushing water through a hose, the pump would be the
24.
3 points
(refer to diagram #1 on the separate diagram sheet) Charge q1 has _______ charge of q2.
25.
3 points
A device which converts chemical energy into electrical energy is called a
26.
3 points
If a test charge is repelled by a negatively charged electric field, the test charge must be
27.
3 points
A device used in circuits to control the direction of current is called a
28.
3 points
(refer to diagram #1 on the separate diagram sheet) In the diagram the two charges are
29.
3 points
(refer to diagram #2 on the separate diagram sheet) A positive test charge at point C will
30.
3 points
An electric heater is operated by applying a potential difference of 50.0 volts across a wire of total resistance 8.00 Ohms. The Power rating of the heater (you must use both the Ohm's Law and Electrical Power equations)
31.
3 points
A 1050 Watt electric toaster operates on a household circuit of 120 volts. What is the resistance of the wire that makes up the heating element of the toaster? (Use the electrical power equation and Ohm's law)
32.
3 points
The measure of the difference in electrical potential energy between two positions in the space divided by charge is called
33.
3 points
you bring a charged object near an uncharged object that is not connected to a ground. The positive and negative charges move to opposite sides of the uncharged object. This is an example of
34.
3 points
In direct current____________
35.
3 points
Two conductors transfer the same amount of charge. One conductor is cooled to near freezing while the other conductor remains at room temperature. The charge going through the conductor near freezing will experience ___________ resistance than the shorter conductor