Examples         

Questions        Answers

 

1.  How can birds safely sit on a power line?

 

2.  Why is it extremely dangerous to place a metal ladder against a power line to fetch a kite?

 

3.  The outlets in most houses are double outlets. Are they connected in series or in parallel. How do you know?

 

4. Assume you have a 60-W bulb in your room and it is on.

     What happens to the overall current and resistance of your room's electric circuit if you turn on an additional 100-W bulb?

 

5. Why would you want to connect batteries in series?

 

6. Why would you want to connect batteries in parallel?

 

 

 

 

 

Problems      Answers

 

EMF and Terminal Voltage

 

Calculate the terminal voltage for a batery with a given internal resistance and a given emf when the battery is connected in series with

given resistors.

 

Resistors in Series and Parallel

 

Given 4 lightbulbs with a stated resistance that are connected in series.

a. Find the total resistance of the circuit

b. Find the total resistance if connected in parallel

 

Kirchoff's Rules

 

Given a battery with 3 resistors in series. Show that the sum of all the voltage changes around the circuit is 0.

 

Capacitors in Series and in Parallel

 

Given six 4.7 mF capacitors connected in parallel.

a. Find the equivalent capacitance in parallel

b. Find the equivalent capacitance in series.