MasteringPhys Multiple Choice =)?

1) A resistor R and another resistor 3.00 R are connected in series across a battery.

If heat is produced at a rate of 15.0W in R, then in 3.00 R it is produced at a rate of?

A) 135W

B) 45.0W

C) 15.0W

D) 5.00W

2) A resistor R and another resistor 2.00R are connected in parallel across a battery. If heat is produced at a rate of 12.0W in R, in 2.00 R it is produced at a rate of?

A) 48.0W

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B) 24.0W

C) 12.0W

D) 6.0W

3) When the switch S in the figure below is closed, the reading of the voltmeter V will?

Link for image:

http://session.masteringphysics.com/problemAsset/1…

A) Increase

B) Decrease

C) Stay the same

4) When the switch S in the circuit in the figure question is closed, the reading of the ammeter A will?