Quiz Questions

1. What is the charge delivered to a capacitor (an electronics component that stores charge) that is connected for 12 hours to a 0.300 Ampère current?

6.94 x 10 -6 C
3.60 C
1.30 x 10 4 C
1.44 x 10 6 C

2. A wire cuts through a magnetic field of 764000 T at an angle of 30° , so that 12.0 cm of the wire are exposed to the field lines. If it is carrying a current of 0.846 Ampères, what is the force acting on it?

38800 N
53900 N
77600 N
108000 N

3. Imagine you are a wire, and you walk between two poles of a magnet, so that you are facing its north pole. All of a sudden, you are connected to a circuit so that current runs through you from head to toe. What happens to you?

You are thrown towards the left, out of the magnetic field
You are thrown towards the right, out of the magnetic field
You are held sideways in mid air, with your head to the right, until the current is switched off
Nothing at all

4. You are the head engineer at a power plant that has an output of 800 MW, at a current of 10 A. If you want to transport this power to the nearby town of ***** at 1200 MV for minimum power loss, what ratio of primary coils to secondary coils do you need in your transformer?

3:2
20:3
2:3
2:30

5. When a wire is moved through a magnetic field,

It is repelled out the other side of the field
A parallel magnetic field is created along the wire
A current that increases the movement is induced
An E.M.F. that opposes the movement is induced

6. Superconductivity occurs

at very high temperatures
at very low temperatures
in elements such as silicon and germanium
at temperatures above the transition temperature

7. It is important that the current entering a motor is direct current so that

it turns in only one direction
it does not short circuit
it can turn faster
it is at it maximum efficiency

8. The potential difference of a circuit component

is the rate at which charges can flow through it
is the work done by the component in moving a charge through it
is the amount of energy taken away from each charge as it passes through it
is the difference between the power of the component, and that of the circuit it is in

9. Find the total resistance of a 50W resistor and a 120W resistor in parallel

0.028 W
35 W
170 W
6000 W

10. A fuse is a piece of wire that has a resistance such that it melts when the current it is rated for is exceeded., thereby disconnecting a circuit Your electric kettle, when operated correctly has a current of 12 A. What would be a good fuse to install in it?

4 A
10 A
14 A
20 A

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