202 Outcome 2

1. 1. Which is the correct formula for Resistance?

2. 2. Which is the correct formula for Ohm's Law?

• V=R÷I

• V=I÷R

• V=IxP

• V=IxR

3. 3. Transpose the formula Z² = R² + X² to make R² the subject.

• R² = X² - Z²

• R² = X² + Z²

• R² = X² - Z²

• R² = Z² - X²

4. 4. The formula for DC Power is?

• P = I x R

• P = I x V

• P = I ÷ V

• P = V x R

5. 5. If a d.c. circuit having two 15 Ω resistors connected in series had a supply voltage of 60 V, the current in the circuit would be:

• 1 A

• 8 A

• 2 A

• 4 A

6. 6. There are 3 resistors connected in Series with the values of 10 ohms, 20 ohms and 30 ohms, what is the total resistance?

• 100 Ohms

• 60 Ohms

• 30 Ohms

• 6000 Ohms

7. 7. If a circuit had three resistors in parallel, each having a resistance of 30 Ω, the total resistance would be:

• 90 Ω

• 60 Ω

• 30 Ω

• 10 Ω

8. 8. Power in a D.C. circuit can be found using the following formula:

• P = R²I

• P = V²/R

• P = V/R

• P = R/V²

9. 9. In a series circuit what is the same across all components?

• Voltage

• Resistance

• Power

• Current

10. 10. The power dissipated in the circuit shown is:

• 100W

• 1000W

• 3000W

• 6000W