Name:
Electricity Unit
Magic Triangle Formula Sheet
3 steps for success:
1. What information do we have? What information do we want to find?
2. Do we have an equation that we can use to find the answer?
a. A good equation includes all of the info from Step 1 (Have & Want)
b. You might need to rearrange the equation to make it work!
3. Replace the symbols in the equation with the actual information.
I=
Current
𝐼𝐼 =
Q=
t=
Q
𝑄𝑄
t
I
𝑡𝑡
Potential Difference
V=
𝑉𝑉 =
E=
E
𝐸𝐸
𝑄𝑄
Q
V
Resistance
R=
𝑅𝑅 =
P=
𝑉𝑉
V
𝐼𝐼
R
Power
𝑃𝑃 =
E
P
t
𝐸𝐸
𝑡𝑡
or
𝑃𝑃 = 𝑉𝑉𝑉𝑉
I
P
V
I