Homework Check Please Circuits?

Question

For questions 1-4 look at this picture
http://geocities.com/atomiccobra/figurea3.gif

1. Look at the circuit shown in Figure A-3. With switch S1 closed, you're making voltage measurements with your meter. Assume that each of the four resistors has a resistance value of 100 kW. You measure 3.6 V across resistor R1, 1.2 V across resistor R2, 1.2 V across resistor R3, and 2.4 V across resistor R4. What is the battery voltage in the circuit?
A. 10 V
B. 6 V
C. 4 V
D. 2 V

B?

2. Again, assume that each of the resistors in the circuit shown in Figure A-3 has a resistance value of 100 kW. With switch S1 open as shown, you measure the voltage across each resistor with your meter. Which of the following statements is correct?
A. Resistors R1, R2, and R3 will dissipate equal amounts of power.
B. Resistor R1 will dissipate the most power.
C. Resistors R4 and R1 will dissipate equal amounts of power.
D. Resistor R3 will dissipate the most power.

D?

3. Assuming that each of the resistors in the circuit shown in Figure A-3 has a resistance value of 100 kW, what will be the total resistance of the circuit?
A. 100 kW
B. 167 kW
C. 280 kW
D. 400 kW

A?

4. Assuming that each of the resistors in the circuit shown in Figure A-3 has a resistance value of 200 kW, which resistor will dissipate the most power?
A. R4
B. R3
C. R2
D. R1

D?

Click the provided link on the top of the question for the Figure

These are the questions that I didnt think I got right so if you can please check my answers and correct the wrongs

Answer 1

(By kW, I'm thinking this means k ohms)

For 1. B is the correct answer as 3.6 + 2.4 = 6 (using a loop equation)

For 2. A is the correct answer. R4 has been switched out. Each resistor will have an equal voltage drop as the resistances are equal. That said the power dissipation will be equal (P=V^2/R).

For 3. I choose B. I assume the switch has been closed again. The total Resistance is R1 + (R2+R3)||R4.

For 4. I choose D. I assume the switch is still closed. As all the Resistances are equal, the most power will be dissipated at the resistor with the largest voltage drop which from 1. is R1.

Answer 2

It would be easier if you had the diagram up here somehow. Afterall, the whole point is to be able to read a diagram and come up with the proper answers for that type of circuit.