Electricity

Question 1

What unit is Current measure in, and what is used to represent current in equations?

Answer 1

Measured in Amperes (Amps, A)
In equations, I

Question 2

What unit is charge measured in, and what represents it in equations?

Answer 2

Measured in Coulombs (C)
In equations, Q

Question 3

What unit is energy measured in, and what represents it in equations?

Answer 3

Measured in Joules, J
In equations, E

Question 4

What unit is power measured in, and what represents it in equations?

Answer 4

Measured in Watts, W
In equations, P

Question 5

What does a voltmeter measure and how should it be placed in a circuit?

Answer 5

Measures voltage, placed in parallel with the component it is measuring

Question 6

Define alternating current (a.c) and direct current (d.c)

Answer 6

a.c. current is constantly changing direction
In d.c, current only flows in one direction

Question 7

Define direct potential difference

Answer 7

Current that only flows in one direction (the same as d.c.)