P4 - Electric Circuit

Question 1

What is the equation that links charge, current and time?

Answer 1

Q = It

Question 2

What does a resistor do?

Answer 2

Limits flow of current

Question 3

What does a thermistor do?

Answer 3

As temp increases, resistance decreases

Question 4

What does a diode do?

Answer 4

Allows current to flow in one direction only

Question 5

What is the equations for Ohm’s law?

Answer 5

V = Ir OR R = V
I

Question 6

Give the equation for potential difference?

Answer 6

V = E
Q

Question 7

How do you figure out gradient in a circuit?

Answer 7

Current (I)
Voltage (V)

Question 8

What is an LDR?

Answer 8

Light dependant resistor

Question 9

What is a series circuit?

Answer 9

Voltages all add up to supply voltage, current is the same throughout

Question 10

What is a parallel circuit?

Answer 10

Total current through the whole circuit is equal to the sum of currents through seperate branches

Question 11

What are the 2 equations for power?

Answer 11

P = E
T
P = I2 X R