Title: M3L1 Series Circuit Practice
Course: ELEC 160WH Introduction to Electricity/Electronics > Section: ELEC 160WH Introduction to Electricity/Electronics

Q: According to Ohm’s Law, if more resistive paths are put in a series between a source’s terminals, the current flow would _____.
- increase
- decrease
A: decrease

Q: The equivalent value of all resistances in a circuit is called the _________.
- source resistance
- total resistance
- total conductance
- total equivalent source
A: total resistance

Q: The current taken from a source by a functioning series circuit is called the _____.
- source current
- total voltage
- total current
- None of the above
A: total current

Q: In a series circuit, current flows through each component.   Since current flow has only one path and the current flow is dependent upon the total resistance the source is connected to, the rate of current flow is _____.
- only the same leaving and returning to the source
- different throughout the pathway
- higher in the conductors and less in resistances
- the same throughout the circuit
A: the same throughout the circuit

Q: In a series circuit, resistances have what is called an IR drop.  This voltage across a given device is proportional to its resistance and can be found by using Ohm's law.  Which below shows this for any resistor?
A: (a choice with no text)

Q: Since this is a series circuit, the previous equation is also equal to ____________.
A: (a choice with no text)

Q: What is the resistance between the two grey terminals of the circuit above?
- 5.8mA
- 137Ω
- 684.9Ω
- 157Ω
A: 157Ω

Q: Assuming a 12V source will be connected to the previous series circuit, what is the expected current draw from the source?
- 76.15A
- 76.43mA
- 700.5mA
- 17.5A
A: 76.43mA

Q: What is the current through R1?
- 76.15A
- 76.43mA
- 17.5mA
- 17.5A
A: 76.43mA

Q: What is the current through R2?
- 800mA
- 76.43mA
- 17.5mA
- 800A
A: 76.43mA

Q: What is the current through R3?
- 200A
- 76.43mA
- 76.5mA
- 17.5A
A: 76.43mA

Q: What is the current through R4?
- 2.15A
- 76.43mA
- 17.5mA
- 17.5A
A: 76.43mA

Q: What is the IR drop, or voltage drop, across R1?
- 4.7V
- 4,730V
- 38.5V
A: 4.7V

Q: What is the IR drop across R2?
- 322V
- 32V
- 1.2V
- 26.25V
A: 1.2V

Q: What is the voltage drop across R3?
- 146
- 14.6
- 5.2V
- 11.9V
A: 5.2V

Q: What is the voltage drop across R4?
- 22V
- 900mA
- 900mV
- 0.900mV
A: 900mV

Q: The sum of all IR drops is equal to __________.
- the source's potential
- 22V
- 6V
A: the source's potential

Q: If more resistive components were added to the series circuit, the total power dissipation would ______.
- increase
- decrease
- remain the same
A: decrease

Q: How much power is dissipated in R1?
- 333mW
- 362.2mW
- 265.3mW
A: 362.2mW

Q: How much power is dissipated in R2?
- 87.6mW
- 255mW
- 35.25mW
A: 87.6mW

Q: How much power is dissipated in R3?
- 362.2mW
- 255mW
- 397.3mW
A: 397.3mW

Q: How much power is dissipated in R4?
- 100.87mW
- 70.1mW
- 202.6mW
A: 70.1mW

Q: The sum of the power dissipations of each resistor is equal to _____.
- 977mW
- 917.2mW
- 877.76mW
A: 917.2mW

Q: The total power is equal to _____.
- 50mW
- 917.2mW
A: 917.2mW

Q: The ohmmeter indicates R_T.

What value should the ohmmeter have on its display?
- 22Ω
- 5.58kΩ
- 685Ω
- None of the above
A: 5.58kΩ

Q: The ammeter indicates the _____ and it should read _____ on its display.
- total resistance, 1.7mA
- source voltage, 1.7mA
- total current, 1.7mA
- total voltage, 1.7mA
A: total current, 1.7mA

Q: The voltmeter indicates ______________.
- the source voltage
- the voltage connected to each end of the series resistive circuit
- the voltage of the device that is to be responsible for establishing current in the circuit
- All of the above
A: All of the above

Q: Which diagram below correctly shows the direction of the current flow and the voltage drops within the previous circuit?
A: (a choice with no text)

Q: The voltmeter indicates the _____________ and it should read ______ on its display.

a) voltage across R3 (I_R3), 1.16mV

b) current through R3 (I_R3), 1.16mA

c) voltage across the 680Ω resistor (V_R3), 1.16V

d) resistance of the 680Ω resistor (R3), 680Ω
- a)
- b)
- c)
- d)
A: c)

Q: A circuit is not functioning the way it should.  After shutting the system down, the total resistance is found to be only 4.38kΩ.

It is decided that a short is the cause of the problem and it must exist across R4.

Looking at the schematic and assuming that the voltage and equipment is safe to work around, what voltage readings would be found across the components while the circuit was live (connected to the source).
- R1 would test 5V, R2 would test 9V, R3 would test 3V, and R4 would test 10V
- R1 would test 5V, R2 would test 3.4V, R3 would test 1.6V, and R4 would test 0V
- R1 would test 5V, R2 would test 2.2V, R3 would test 3V, and R4 would test 1V
- R1 would test 3V, R2 would test 3V, R3 would test 3V, and R4 would test 1V
A: R1 would test 5V, R2 would test 3.4V, R3 would test 1.6V, and R4 would test 0V