Electrical Current: Revision 20% Quiz

Which circuit is a series circuit?

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Which circuit is a parallel circuit?

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What happens if a light bulb goes out in a series circuit?

• All the light bulbs still work.

• Nothing changes.

• All but one still works.

• All the light bulbs stop working.

• The electrons begin to move in the opposite direction.

A parallel circuit has 3 light bulbs. One light bulb stops working, what will happen to the other two?

• The electrons only flow through one light bulb.

• The other two light bulbs still work.

• They go on fire.

• All the light bulbs stop working.

• The electrons begin to move in the opposite direction.

For the following circuit, R1 = 3, R2 = 4, what is my total resistance?

• 7 ohms.

• 12 ohms.

• 1 ohm.

• 1.71 ohms.

• 2 ohms.

My total resistance in the previous question was 7 ohms. Now I add a third resistor (R3 = 5 ohms). What is the total resistance now?

• 7 ohms.

• 1 ohm.

• 1.71 ohms.

• 5 ohms.

• 12 ohms.

What happens to the total resistance in a SERIES circuit when I add a resistor?

• The total resistance stays the same.

• The total resistance becomes a negative value.

• The total resistance decreases.

• The total resistance increases.

• The total resistance becomes 0.

For the following circuit, R1 = 8, R2 = 6, what is my total resistance?

• 14 ohms.

• 48 ohms.

• 3.42 ohms.

• 2.21 ohms.

• 1.1 ohm.

My total resistance was 3.42 ohms with two resistors, I add a third resistor (R3 = 4), what is my total resistance now?

• 7.42 ohms.

• 2.35 ohms.

• 0.62 ohms.

• 1.84 ohms.

• 3.14 ohms.

What happens to the total resistance in a PARALLEL circuit when I add a resistor?

• The total resistance stays the same.

• The total resistance becomes a negative value.

• The total resistance decreases.

• The total resistance increases.

• The total resistance becomes 0.