7. Two identical 5 resistors and a 10 resistor are connected in a circuit. Which of the following cannot be the effective resistance of these.

7.

Two identical 5Ω resistors and a 10Ω resistor are connected in a circuit. Which of the following cannot be the effective resistance of these resistors?

a. 20 Ω

b. 12.5 Ω

c. 8.3 Ω

d. 17.5 Ω

8.

A 2Ω resistor is in parallel with a 8Ω resistor. The pair is in series with a 10Ω resistor and a 50 volt battery. What is the current through the 2Ω resistor?

a. 3.4 A

b. 6.0 A

c. 8.2 A

d. 9.8 A

9.

Three identical resistors (R) are connected in a circuit so that two are in series and the third is in parallel with the combination of the first two. If connected to a battery individually, each resistor dissipates power P. Determine the power dissipated by the network combination when connected to the same source.

a. 3 P

b. 2.5 P

c. 2 P

d. 1.5 P