FORMULA CHAPTER
\mathrm{Q}=\mathrm{n}\mathrm{e}
\mathrm{I}=\frac{\mathrm{Q}}{\mathrm{t}}
\mathrm{V}=\frac{\mathrm{W}}{\mathrm{Q}}
\mathrm{V}_{1}-\mathrm{V}_{2}=\frac{\mathrm{W}}{\mathrm{Q}}
Statement: At constant temperature, the current through an ohmic conductor is directly proportional to the potential difference across it.
\mathrm{V}=\mathrm{I}\mathrm{R}
\mathrm{Q}=\mathrm{n}\mathrm{e}
Question: Using Electric Charge from Number of Electrons, solve the case where n = 2 × 10¹⁹.
Calculation: Apply the Electric Charge from Number of Electrons formula.
Step 1: Substitute the stated values into the formula.
Step 2: Q = n × e.
Answer: Q = 3.2 C.
\mathrm{I}=\frac{\mathrm{Q}}{\mathrm{t}}
Question: Using Electric Current, solve the case where q = 10 C, t = 2 s.
Calculation: Apply the Electric Current formula.
Step 1: Substitute the stated values into the formula.
Step 2: I = 10/2.
Answer: I = 5 A.
\mathrm{V}=\frac{\mathrm{W}}{\mathrm{Q}}
Question: Using Electric Potential, solve the case where w = 20 J, Q = 4 C.
Calculation: Apply the Electric Potential formula.
Step 1: Substitute the stated values into the formula.
Step 2: V = 20/4.
Answer: V = 5 V.
\mathrm{V}_{1}-\mathrm{V}_{2}=\frac{\mathrm{W}}{\mathrm{Q}}
Question: Using Potential Difference, solve the case where w = 12 J, Q = 3 C.
Calculation: Apply the Potential Difference formula.
Step 1: Substitute the stated values into the formula.
Step 2: V1 − V2 = 12/3.
Answer: Potential difference = 4 V.
Statement: At constant temperature, the current through an ohmic conductor is directly proportional to the potential difference across it.
\mathrm{V}=\mathrm{I}\mathrm{R}
Question: Using Ohm’s Law, solve the case where i = 2 A, R = 5 ohm.
Calculation: Apply the Ohm’s Law formula.
Step 1: Substitute the stated values into the formula.
Step 2: V = 2 × 5.
Answer: V = 10 V.
