Title: Mid-Unit Assessment
Course: MNPCC Physics > Section: Electricity and Magnetism

This quiz will help you see how you are progressing in your understanding of the content.

Q: In which type of circuit does adding resistors cause the overall resistance to go up?
- In series circuits only. (Correct.)
- In parallel circuits only. (Opposite.)
- In both series and parallel circuits. (It will go down in one of them.)
- In neither type of circuit. (It will go up in one of them.)
A: In series circuits only.
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: A glass rod is rubbed on a piece of silk.  They are then hung from string and brought near each other.  What will be observed?
- They will repel each other because they have the same charge. (When two objects are rubbed together, they get oppositely charged.)
- They will attract each other because they have the same charge. (When two objects are rubbed together, they get oppositely charged. Likes repel.)
- They will repel each other because they have opposite charges. (Opposites attract.)
- They will attract each other because they have opposite charges. (Correct.)
A: They will attract each other because they have opposite charges.
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: A positive current is allowed to go through a wire in the direction shown.  Which way with the North pole of the compass, which is below the wire, point once the current is flowing?
- Left (Correct.)
- Right. (That is opposite.)
- Up (Magnetic fields are always perpendicular to current flow.)
- Down (Magnetic fields are always perpendicular to current flow.)
A: Left
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: What would happen if I tried to move an aluminum plate through a very strong magnetic field?
- Plate will interact with the field causing a drag-like force. (Correct.)
- There will be no interaction between the field and the plate. (Magnets moving with respect to any conductor will interact with the conductor.)
- Plate will interact with the field causing it to be easier to move. (This would lead to perpetual motion machines, so no.)
A: Plate will interact with the field causing a drag-like force.
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: A compass is near a magnet, the North end of the compass is pointing at the magnet.  If the magnet is flipped over, what will happen to the compass?
- The compass will point the opposite way. (Correct.)
- The compass will continue to point the same way. (The compass is a magnet so what was attracted is now repelled.)
- The compass would turn 90 degrees. (The field is flipped 180 degrees so the compass will as well.)
A: The compass will point the opposite way.
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: What happens to the amount of charge flow (current), as the resistance is increased.
- It increases. (It is an inverse relationship.)
- It decreases. (Correct.)
- It remains the same. (There is an inverse relationship.)
A: It decreases.
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Two bulbs are hooked up to the same potential difference.  Bulb A has twice the current through it compared to bulb B.  How do the power output of the two compare?
- Bulb A has twice the power. (Correct.)
- Bulb A has half the power. (It is a direct relationship.)
- Bulb A has four times the power. (It is not a squared relationship.)
- Bulb A will have four times less power. (Wrong direction and not a squared relationship.)
A: Bulb A has twice the power.
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which type of circuit consists of multiple paths for charge to follow?
- Parallel (Correct.)
- Series (Series has only one path.)
- Closed (This is not specific enough, closed circuits can have any number of paths.)
- Open (Open circuits have no paths.)
A: Parallel
If right: Your answer is correct.
If wrong: Your answer is incorrect.