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Led and resistor circuit

I'm using 2 circuits, one with 3 LEDs and one with 4 LED's. Led's are rated at 2.6v, 70ma. LED's will be wired in series. Power source is ~13.8v.

Circuit 1
3LEDs in series connected to a 82ohm 1w resistor and a 6.8ohm 1w resistor (resistors in series).

Circuit 2
4LEDs in series connected to a 51ohm 1/2w resistor and a 1.3ohm 1/2w resistor (resistors in series).

Will these give me nominal voltage and current?

Please Help

1. What is the total resistance in a circuit that contains three 60 W resistors connected in series?

A. 20 W
B. 60 W

C. 120 W

D. 180 W




2. What type of circuit measurement is made by placing a meter's test leads in parallel with a deenergized component?

A. Current
B. Resistance

C. Voltage

D. Power




3. What is the total current of the circuit shown in the figure below?



A. 10 A
B. 3 A

C. 1 A

D. 0.1 A




4. A series circuit contains four resistors. In the circuit, R1 is 80 W, R2 is 60 W, R3 is 90 W, and R4 is 100 W. What is the total resistance?

A. 70.3 W
B. 250 W

C. 330 W

D. 460 W




5. What is the voltage at points B and D in the figure shown below?



A. 4 V
B. 6 V

C. 8 V

D. 10 V




6. Which one of the following is the correct power formula?

A. P = IR
B. P = E/R

C. P = EI

D. P = I2/R




7. What is the total resistance of a circuit that contains two 100 W resistors connected in parallel?

A. 10 W
B. 30 W

C. 50 W

D. 150 W




8. Which of the following is the correct Ohm's law formula used to find current?

A. I = R/E
B. I = E/R

C. I = E2/R

D. I = PR




9. The figure below shows a DC motor that contains a series field winding (F1) with a resistance of 10 W, a parallel field winding (F2) with a resistance of 20 W, and an armature with a resistance of 2 W. What is the total resistance of this motor?

A. 11.82 W
B. 16.4 W

C. 24 W

D. 32 W






10. If the voltage in a circuit is 24 V and the current is 2 A, what is the total power in the circuit?

A. 6 W
B. 48 W

C. 72 W

D. 102 W




11. What does the abbreviation VOM stand for?

A. volt-ohm-megohm
B. volt-ohm-milliammeter

C. volume-ohm-microamp

D. volume-origin-megohm




12. What is the voltage drop across R4 in the diagram shown below?



A. 10 V
B. 30 V

C. 70 V

D. 80 V




13. Which of the following is the correct Ohm's law formula used to find resistance?

A. R = EI
B. R = E/I

C. R = PI

D. R = I/E




14. What is the total power in a circuit with a current of 4 A and a resistance of 12 W?

A. 4 W
B. 16 W

C. 48 W

D. 192 W




15. A circuit contains four resistors connected in series. R1 is 100 W, R2 is 200 W, R3 is 240 W, and R4 is 600 W. What is the total circuit resistance?

A. 1,200 W
B. 1,140 W

C. 600 W

D. 80 W




16. What is the power dissipated by the parallel resistor circuit shown below?



A. 10 W
B. 48 W

C. 60 W

D. 100 W




17. What is the power dissipated by R2 in the circuit shown in the figure in Question 16?

A. 5 W
B. 12 W

C. 16 W

D. 33.3 W




18. Which one of the following voltages should never be measured directly with a VOM?

A. 100 V
B. 500 V

C. 800 V

D. 1,200 V




19. Which of the following is the correct formula for finding power in a DC circuit?

A. P = IR
B. P = I2R

C. P = ER

D. P = E2I




20. What is the voltage in a circuit with a resistance of 100 W and a current of 0.04 A?

A. 4 V
B. 8 V

C. 10 V

D. 40 V




21. The pointer of an analog meter is connected to a

A. permanent magnet.
B. electromagnet.

C. coil suspended by bearings.

D. voltage to frequency converter circuit.




22. What is the resistance in a circuit that has a voltage of 60 V and a current of 2 A?

A. 10 W
B. 30 W

C. 60 W

D. 120 W




23. What is the power dissipated by a resistor with a current of 0.02 A and a resistance of 1,000 W?

A. 0.4 W
B. 4 W

C. 20 W

D. 200 W




24. In a circuit, two resistors of 100 W and 80 W are connected in parallel. The parallel group is then connected in series with a 100 W resistor. What is the total resistance of the circuit?

A. 280 W
B. 144 W

C. 120 W

D. 44 W




25. What is the power of a parallel circuit with a resistance of 1,000 W and a current of 0.03 A?

A. 0.09 W
B. 0.9 W

C. 9 W

D. 30 W

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