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Chapter 35 Review:            Electric Circuits

 

1.                  Be able to do simple calculations using Ohmís Law.  Write the Ohmís law formula to solve for I, A, V, R, & W.

 

 

 

2.                  Series Circuit: (1st draw a schematic of 3 bulbs in series, the resistance is 10W in each bulb and the power source is 24V)

 

 

 

 

 

 

a.      What can be said about the brightness of the three bulbs?

b.      What value is constant?

c.      What is the total resistance in the circuit?

d.      What is the total current in the system?

e.      What is the current across each bulb?

f.        What happens to the other bulbs when one is removed? (Why?)

 

3.                  Parallel Circuit: (1st draw a schematic of 3 bulbs in parallel, the resistance is 10W in each bulb and the power source is 24V)

 

 

 

 

 

 

a.      What can be said about the brightness of the three bulbs?

b.      What value is constant?

c.      What is the total resistance in the circuit?

d.      What is the total current in the system?

e.      What is the current across each bulb?

f.        What happens to the other bulbs when one is removed? (Why?)

 

4.                  What is a fuse and why is it used?

 

5.                  Draw a dry cell and label the following. Anode, cathode, terminals, path of electrons as a conductor connects the terminals.

 

 

 

 

 

 

6.                  Define the following devices.

 

a.      Commutator

b.      Diode

c.      Capacitor

 

7.                  What are the four parts of a circuit?

 

8.                  What is the formula for electric power?

 

9.                  Use the electric power formula to determine the amps flowing through a 100W light bulb (the voltage in you house is 110V).

 

10.              Magnet stuff.

 

a.      What is a magnetic domain?

b.      What is a magnetic field?

c.      Where is magnetic north?

d.      Which are the positive and negative poles on a magnet?

e.      What is the direction of the magnetic field related to the magnetic poles (draw)

f.        How are electric currents and magnetic fields related?

g.      How is an electromagnet created?

h.      What are some practical uses for the electromagnet?

i.        What types of materials make good magnets?  Why?

j.        What are three ways to destroy a magnet?

k.      What is the magnetic declination of the Earth?

l.        What is the magnetosphere?

 

 

 

 

 

11.              Draw the following schematic symbols:

a.      Battery (label the positive and negative terminals).

b.      Resistor

c.      Capacitor

d.      Voltmeter

e.      Amp meter

f.        Switch

g.      Conductor

h.      Positive ground wire

 

 

 

 

Last modified: June 01, 2004