Series circuit questions

Instructions:

There are 20 questions.

For the multi-choice questions:

  • choose the correct answer
  • write down your answer.

For the calculation questions:

  • calculate the unknown value
  • specify the appropriate unit
  • write down your answer.

Note:

  • You can print this document and write you answers onto it.

Question 1

If the resistance in a series circuit is increased, the current flow through the circuit will:

  1. decrease
  2. stay the same
  3. increase.

Question 2

If the voltage applied to a series circuit is decreased, the current flow through the circuit will:

  1. increase
  2. decrease
  3. stay the same.

Question 3

How will the total current flow of a series circuit be affected if an additional resistor is added in series to the circuit?

  1. Current will increase.
  2. Current will decrease.
  3. Current will stay the same.

Question 4

To calculate the total resistance of a series circuit that contains two resistors you must:

  1. multiple the two resistors values
  2. add the two resistor values together
  3. subtract the lower resistor value from the larger resistor value.

Question 5

If the current in a series circuit is increased, the power consumption of the circuit will:

  1. decrease
  2. stay the same
  3. increase.

Question 6

The voltage drops across each of three resistors in a series circuit will always add up to total?

  1. The supply voltage.
  2. More than the supply voltage.
  3. Less than the supply voltage.

Question 7

Calculate total resistance when the total voltage is 20V and the current flow is 0.4A

Question 8

Calculate total power dissipated when the total voltage is 18V and the current flow is 0.5A

Question 9

Calculate total power dissipated when the total resistance is 654 ohms and the current flow is 0.045A

Question 10

Calculate total power dissipated when the total voltage is 10V and the total resistance is 400 ohms

Question 11

Calculate resistance of R2 when R1 has a resistance of 0.2 ohms, R3 is 5.3 ohms and the total resistance is 400 ohms

Question 12

Calculate total voltage when voltage across R1 is 3V, R2 is 2V and R3 has a resistance of 10 ohms

Question 13

Calculate total voltage when voltage across R1 is 6V, R2 is 4V, R3 has a resistance of 10 ohms and the total current flow is 0.2A

Question 14

A circuit exists with a power supply connected to a load. There is a voltmeter connected across the load reading 110V, and an ammeter connected in series with the load reading 4A. What is the resistance value of the load?

Question 15

What voltage is required to force 2.2A through a resistance of 50Ω?

Question 16

An electric iron is connected to a supply voltage of 210 volts. An ammeter connected into a circuit shows that 3 amps are flowing.What is the resistance of the iron?

Question 17

A 240V supply is connected to a factory. When on full load the factory has a current draw of 5 amps.What is the total resistance of the installation?

Question 18

The voltage across a 300Ω resistor is 240V. What is the current flow through the resistor?

Question 19

Three loads are connected in series; the loads are connected to a 240V power supply. When a voltmeter is connected across the first load it shows a voltage drop of 160V. What is the voltage drop across either of the other two loads?

Question 20

There are two resistors connected in series in a circuit. One resistor is double the resistance value of the other. If you measured the current flow through each resistor with an ammeter, which would show the larger current flow?

  1. The higher value resistor.
  2. The lower value resistor.
  3. The current flow would be the same through each.

When you have finished:

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