Current And Voltage

Question 1

Electrical currents can be represented by ……. Diagrams?

Answer 1

Circuit

Question 2

What two things are important for a circuit to work?

Answer 2

• there must be a complete circuit

- there must be no short circuits

Question 3

What is a series circuit?

Answer 3

Componants ar connected one after another in a loop. The current that flows across each componant is the same.

Question 4

If two lamps are connected in series and one breaks, will the other lamp light?

Answer 4

No

Question 5

What is a parallel circuit?

Answer 5

Componants are connected on seperate loops in parallel. The current is shared between each componant.

Question 6

In a parallel circuit, if one lamp breaks, will the other lamp still work?

Answer 6

Yes

Question 7

What is electric current?

Answer 7

A flow of electric charge.

Question 8

What is current measured in?

Answer 8

Amperes (amps/A)

Question 9

How is current through a circuit measured?

Answer 9

Through an ameter.

Question 10

A potential difference, also known as ……, across an electrical componant is needed to make a …… Flow through it.

Answer 10

Voltage

Current

Question 11

….. And batteries often provide the potential difference needed.

Answer 11

Cells

Question 12

What is potential difference measured in?

Answer 12

Volts (V)

Question 13

What measures the potential difference across a componant?

Answer 13

A voltmeter

Question 14

How must a voltmeter be connected?

Answer 14

In parallel with the circuit.

Question 15

What is charge measured in?

Answer 15

Coulombs (C)

Question 16

A typical cell produces a potential difference of 1.5V. If there was 2 cells, what would the potential difference be?

Answer 16

3V because the total potential difference is the sum of their potential differences.

Question 17

When more cells are connected in series in a circuit, they produce a bigger potential difference across its componants. More current flows through the componants as a result. What will happen to the reading on the ammeter?

Answer 17

It will increase.

Question 18

When two or more componants are connected in series, the …. Current flows through each componant.

Answer 18

Same

Question 19

In a series circuit, the total potential difference of the supply is shared between the componants. This means if you add together the voltages across each componant connected in series, the total …… The voltage of the …. Supply.

Answer 19

Equals, power