Equations

Question 1

How do you calculate power? (supplied to an appliance)

Answer 1

P= I x V

power) (current) (potential difference

Question 2

How do you calculate the total resistance in a series circuit?

Answer 2

Rt = R1 + R2 + R3 …

ohms

Question 3

How do you calculate the total resistance in a parallel circuit?

Answer 3

1/Rt = 1/R1 + 1/R2 + 1/R3 …

Question 4

How do you calculate power supplied to a resistor?

Answer 4

P = I2R

W) (Current) (Resistance

Question 5

How do you calculate the charge flow?

Answer 5

Q = I x t

c) (current) (time

Question 6

How do you find the energy transferred to a device?

Answer 6

E = P x t

Question 7

What equation do you use to calculate the power when you are given the energy and time?

Answer 7

P = E/t also you can change this to E = P x t

Question 8

How do you calculate the energy transferred to a component?

Answer 8

E = V x Q

J) (potential difference) (coulombs

Question 9

How do you find the potential difference?

Answer 9

V= E/Q

Question 10

How do you find the efficiency of something?

Answer 10

efficience= output power/input power (x 100%)

Question 11

How do you find the current if you are given power and potential difference?

Answer 11

I= P/V

Question 12

How do you find the current if you are given the charge and the time?

Answer 12

I= Q/t

Question 13

Charge?

Answer 13

Q (coulombs)

Question 14

Current?

Answer 14

I (current) (Amps/A)

Question 15

Potential difference/voltage?

Answer 15

V

Question 16

Power?

Answer 16

W(watts)