Phys 1260 Exam Questions
with Answers (Joel dewitt)
Circuits - -Any path along which electrons can flow form the negative
terminal to the positive terminal.
- Complete circuits - -Allows continuous flow of electrons with o openings or
gaps.
- Circuits in series - -Forms a single pathway for electron flow between the
terminals of the battery, generator, or wall outlet.
- Circuits in parallel - -forms branches, each of which is a separate path for
the flow of electrons
- Characteristics of series circuits - -1. Electric current through a single
pathway.
2. total resistance to current is the sum of individual resistances.
3. current is equal to the voltage supplied by the source divided by the total
resistance of the circuit.
4. the total voltage impressed across a series circuit divides among the
individual electrical devices in the circuit so that the sum of the "voltage
drops" across the resistance of each individual device is equal to the total
voltage supplied by the source.
5. The voltage drop across each device are proportional to its resistance.
6. if one device fails, the current in the entire circuit stops.
- Characteristics of a parallel circuit - -1. voltage is the same across each
device.
2. the total current int the circuit divides among the parallel branches. the
amount of current in each branch is inversely proportional to the resistance
in each branch.
3. the total current in the circuit equals the sum of the currents in its parallel
branches.
4. As the number of parallel branches is increased, the overall resistance of
the circuit is decreased.
5. A break in one path does not interrupt the flow of charge in other paths.
- When two identical lamps in a circuit are connected in parallel, the total
resistance is
A. Less than the resistance of either lamp
B. The same as the resistance of each lamp
C. less than the resistance of each lamp
with Answers (Joel dewitt)
Circuits - -Any path along which electrons can flow form the negative
terminal to the positive terminal.
- Complete circuits - -Allows continuous flow of electrons with o openings or
gaps.
- Circuits in series - -Forms a single pathway for electron flow between the
terminals of the battery, generator, or wall outlet.
- Circuits in parallel - -forms branches, each of which is a separate path for
the flow of electrons
- Characteristics of series circuits - -1. Electric current through a single
pathway.
2. total resistance to current is the sum of individual resistances.
3. current is equal to the voltage supplied by the source divided by the total
resistance of the circuit.
4. the total voltage impressed across a series circuit divides among the
individual electrical devices in the circuit so that the sum of the "voltage
drops" across the resistance of each individual device is equal to the total
voltage supplied by the source.
5. The voltage drop across each device are proportional to its resistance.
6. if one device fails, the current in the entire circuit stops.
- Characteristics of a parallel circuit - -1. voltage is the same across each
device.
2. the total current int the circuit divides among the parallel branches. the
amount of current in each branch is inversely proportional to the resistance
in each branch.
3. the total current in the circuit equals the sum of the currents in its parallel
branches.
4. As the number of parallel branches is increased, the overall resistance of
the circuit is decreased.
5. A break in one path does not interrupt the flow of charge in other paths.
- When two identical lamps in a circuit are connected in parallel, the total
resistance is
A. Less than the resistance of either lamp
B. The same as the resistance of each lamp
C. less than the resistance of each lamp
