SP212
Worksheet 15
Ch 27.1 Single Loop Circuits
Problem 1
In the circuit shown below the EMFs are E1 = 150 V and E2 = 50 V, and the resistances are R1 = 3.0 Ω
and R2 = 2.0 Ω.
a) What is the magnitude of the current running around the circuit? In which direction (clockwise or
counterclockwise)?
b) What is the voltage across resistor 1? Resistor 2?
c) What is the potential difference between points P and Q, VQ − VP ?
d) What is the total energy provided to the circuit by battery 1after 1 minute?
Problem 2
You have two resistors with the same resistance, R = 3 Ω and a battery that provides an EMF of E = 6 V.
a) If you hook the two resistors up in series with the battery, what is the energy dissipated by each resistor
as thermal energy?
b) If you now hook the resistors up in parallel with the battery, what is the energy dissipated by each resistor
as thermal energy?