A2 - LT1 - Describe the Characteristics of a Series Circuit

Question 1

How many paths for current flow are there for a series circuit?

Answer 1

1

Question 2

As more resistors are connected in series, there is an increase in total:

A. Resistance
B. Current
C. Voltage
D. Power

Answer 2

A. Resistance

Question 3

A series circuit consists of three resistors. If one resistor is removed, and the remaining two resistors are connected in series to the same source, then the current in each of these two resistors will be:

A. The same as before
B. Less than before
C. More than before
D. Zero

Answer 3

C. More than before

Question 4

Two ammeters are connected in series with a circuit, as shown. Which ammeter(s) is/are marked with the correct polarity?

Answer 4

Neither

Question 5

Two resistors are connected in series to a 12V battery. One resistor is 4Ω and the other resistor is 8Ω. The voltage drop across the 4Ω resistor is:

A. Zero volts
B. Less than the voltage drop across the 8Ω resistor.
C. More than the voltage drop across the 8Ω resistor
D. The same as the voltage drop across the 8Ω resistor.

Answer 5

B. Less than the voltage drop across the 8Ω resistor.

Question 6

Four equal resistors are connected in series to a 12V supply. If each resistor has a value of 6Ω, What is the total circuit resistance?

Answer 6

24Ω

Question 7

Three resistors connected in series have a total resistance of 16Ω. If R₁ = 4Ω and R₂ = 6Ω, what is the value of R₃?

Answer 7

6Ω

Question 8

A string of 10 Christmas tree lights is connected in series to a 120V supply. When the circuit is energized, what is the voltage drop across each light?

Answer 8

12V

Question 9

R₁ and R₂ are in series with a source voltage of 90V. If E₁ is 30V, what is the value of E₂?

Answer 9

60V

Question 10

The sum of the IR drops in a series circuit:

A. Is less than the smallest voltage drop
B. Is usually more than the applied voltage
C. Equals the average of all the voltage drops
D. Equals the applied voltage

Answer 10

D. Equals the applied voltage

Question 11

When two resistors are connected in series:

A. There is only one path for current through both resistors
B. They must both have the same resistance values
C. The voltage across each must be the same
D. All of the above are correct

Answer 11

A. There is only one path for current through both resistors.

Question 12

One of the main disadvantages of a series circuit is that:

A. An open in the circuit causes voltage to increase across all the components.
B. An open in the circuit interrupts current to all the devices
C. A short in one device reduces current through all the remaining devices
D. A short in one device interrupts current to all the devices.

Answer 12

B. An open in the circuit interrupts current to all the devices.

Question 13

In this circuit, the voltmeter would read:

A. 0V
B. 30V
C. 60V
D. 120V

Answer 13

D. 120V

Question 14

What is the relationship for resistance in a series circuit?

Answer 14

R_T = R₁ + R₂ + R₃ …..

Question 15

What is the relationship for current in a series circuit?

Answer 15

I_T = I₁ = I₂ = I₃ ….

Question 16

What is a voltage drop?

Answer 16

The difference in potential across each resistance. It’s magnitude is in direct proportion to the value of the resistance. The greater the value of resistance in a series circuit, the higher the voltage drop across that resistor.

Question 17

What is the relationship of voltages in a series circuit?

Answer 17

E_t = E₁ + E₂ + E₃ …

Question 18

What are the disadvantages of a series circuit?

Answer 18

An open in any one device will interrupt current flow to all remaining devices.

A short in one device will cause an increase in current through all the devices

Changing the resistance value of one device will change the current, voltage and power values of all remaining devices.