Electricity And Magnetism- Equations

Question 0

For the link between voltage, resistance and current.

Answer 0

V=IR

Question 1

For the relation between charge (coulombs), current and time.

Answer 1

Q=It

Question 2

For the link between voltage, energy and charge.

Answer 2

V=E/Q

Question 3

For the link between energy, current, time and voltage.

Answer 3

E=ItV

Question 4

For the link between resistance, Resistivity, length and area.

Answer 4

Resistance= Resistivity constant of wire x L/A

Question 5

For potential dividers when working out voltages and resistances.

Answer 5

Vout = (R2/R1+R2) x Vin

Question 6

The 3 equations for power in a circuit:

Answer 6

P=IV
P=I2R
P=V2/R

Question 7

For transformers when working out voltages and number of coils.

Answer 7

V1/V2 = N1/N2