10 minutes maximum! Can you do it in 5? |
||||||||||||||||
1. A current of 2 amps flows along a conductor. Which of these statements correctly describes this current?
|
||||||||||||||||
2. Which of these answers best describes the name and polarity of the charge carrier in a metal conductor?
|
||||||||||||||||
3&4. A cell is connected to a motor. A charge of 12 coulombs flows through the motor in 3 seconds. The voltage of the cell is 6 V, and it has a negligible internal resistance. |
||||||||||||||||
3. What is the current flowing in the circuit?
|
||||||||||||||||
4. What work has been done by the cell in this time?
| ||||||||||||||||
5. An electronvolt is a unit of...
| ||||||||||||||||
Two charges +Q are separated by a distance r. There is a repulsion force F acting between the 2 charges as shown: |
||||||||||||||||
6. What is the size of the force if the charges are moved to a distance of ½ r?
|
||||||||||||||||
7. Which of these changes to the diagram in Q5 would increase the force to 6F?
| ||||||||||||||||
8. Two copper rods, P and Q, have identical currents flowing through them. P has a smaller diameter than Q. |
||||||||||||||||
Which of these answers best describes the differences between values of 'n' and 'v' in both rods, using the formula I = nAvq?
| ||||||||||||||||
9. At which point in this diagram is the electric field due to the 2 charges equal to zero?
| ||||||||||||||||
10. The sign of the right hand charge has now been reversed. At which point in this diagram is the electric field zero? | ||||||||||||||||