Series and Parallel Circuits

Question 1

What are two ways that a component can be connected in a circuit?

Answer 1

.Series and parallel

Question 2

How does the potential difference across two components vary when connected in series and parallel?

Answer 2

.Series circuit: The total potential difference is shared between each component

.Parallel circuit: Potential difference across each component is the same

Question 3

If two resistors are connected in parallel, what can be said about their combined resistance?

Answer 3

.Their total resistance is less than the smallest of the two individual resistances.

Question 4

If two resistors are connected in series, what can be said about their total resistance?

Answer 4

.Their total combined resistance is equal to the sum of the two individual resistances.

Question 5

Describe the current in a series circuit

Answer 5

.In a series circuit, the current is the same at all positions

Since the charge only has one path to flow through

Question 6

Describe the current in a parallel circuit.

Answer 6

.In a parallel circuit, the current is shared between the different branches.

Question 7

How should you connect an ammeter in a circuit to measure the current?

Answer 7

.Ammeters should be connected in series with the component that they are measuring current through.

Question 8

How should you connect a voltmeter in a circuit to measure potential difference?

Answer 8

.Voltmeters should be connected in parallel to the component that they are measuring the potential difference of.

Question 9

Why is it advantageous to connect lamps in parallel?

Answer 9

.If one lamp blows, the rest of the components will be unaffected and can still receive current.

.For example, the current is still complete.

Question 10

Define direct current (D.C)

Answer 10

.A current that flows constantly in one direction from positive to negative terminal.

Question 11

What produces direct current?

Answer 11

.Electric cells or batteries

Question 12

What are two disadvantages of series circuit?

Answer 12

.If one of the components breaks , all the others would working as well.

.The components cannot be controlled (switched on and off) separately.

Question 13

Define alternating current?

Answer 13

.A current that continuously changes its direction.

Question 14

What are the differences between DC and AC?

Answer 14

.Direct Current:
Continuous and in one direction
Produced by cells and batteries
Has a positive and negative terminal.

.Alternating current:
Constantly changes direction
.Produced by electrical generators
.Has two identical terminals