Download Chapter 10 Review questions

Chapter 10 Review questions
5.
series circuit
parallel circuit
- Only one path for
- More than one path for
electrons
electrons
- If current pathway is
- If one pathway is non
broken at any one point
functional other
whole circuit is non
pathways still allow the
functional
flow of electrons
- The sum of the voltage
- The voltage drop across
drops across each of the
each of the branch
loads is equal to the
circuits is the same as
voltage drop across the
the voltage drop across
source.
the source.
6. a. The electric charges release most of their energy in
the electrical load of the circuit.
b. The connectors release the least amount of energy
as they are also made up of conductors that have some
resistance. However the amount lost is very very small.
7. a and b. When an electrical load is not connected in a
circuit the connector acts as the only load and because it
has a very small resistance the wires gets heated up
resulting sometimes in a fire.
8. When one bulb burns out there is break in the pathway
of the electrons resulting in no flow of electrons through the
circuit.
9. When you have more than three or four loads in a
series circuit, the loss of one load will stop the function of
the other loads. That is the reason why more than 3 or 4
loads are not connected in series.
10. a. All bulbs burning
b. All bulbs not burning
c. Light bulb 3 and 5 will not burn
d. Bulbs 1 and 2 glow the rest don’t as the wire
replacing bulb 6 will act as a short circuit and all the
electrons flow through that pathway where the resistance
is the least.
11. a. 38.4V
b. 119.85V
c. 18V
13. a. 9V
14. 1.3V when connected in parallel the voltage remains
the same
V
15. a. Ammeter is connected in series because to measure
the current we want all the electrons flowing through the
bulb to also flow through the ammeter.
b. The voltmeter is always connected in parallel to the
battery so as to measure the drop in voltage across the
two terminals of the source.
16.
V
120 V
18. Blender – electrical energy into mechanical energy
with some sound and heat energy
Television – electrical energy to light energy with
sound and some heat energy
Stove – electrical energy into heat energy with some
light energy
Kettle – electrical to heat energy with some sound
energy