equations for test

Question 1

How can current be calculated?

Answer 1

current = charge/time
I=Q/T

Question 2

How can voltage be calculated?

Answer 2

energy / charge
V=E/Q

Question 3

How can resistance be calculated?

Answer 3

voltage/current
V=IR

Question 4

How can power be calculated?

Answer 4

voltage * current
P=VI

Question 5

How can power loss be calculated?

Answer 5

current² * resistance
I²R

Question 6

How can transformers be calculated?

Answer 6

Vₚ/Vₛ = Nₚ/Nₛ
VₚIₚ=VₛIₛ
ₚ = primary coil
ₛ=secondary coil
V = voltage
N = number of turns of coil

Question 7

How can voltage be calculated in a series circuit?

Answer 7

V=V₁+V₂

Question 8

How can voltage be calculated in a parallel circuit?

Answer 8

V=V₁=V₂

Question 9

How can current be calculated in a series circuit?

Answer 9

I=I₁=I₂

Question 10

How can current be calculated in a parallel circuit?

Answer 10

I=I₁+I₂

Question 11

How can resistance be calculated in a series circuit?

Answer 11

R=R₁+R₂

Question 12

How can resistance be calculated in a parallel circuit?

Answer 12

1/R total=1/R₁+1/R₂

Question 13

How can energy be calculated?

Answer 13

energy = power * time
E= P*t