Electricity-3rd Form

Question 1

What is electrical current?

Answer 1

Flow of electrical charge

Question 2

The size of electric current is also the rate of …

Answer 2

Electrical charge

Question 3

In a closed loop what is the value of the current

Answer 3

Always the same

Question 4

What is alternating current?

Answer 4

When the electric current is constantly changing between positive and negative

Question 5

What is direct current

Answer 5

When the electrical charge is always flowing in the same direction

Question 6

When do the resistance of components such as lamps, diodes, thermistors and LDR’s change?

Answer 6

When the current changes

Question 7

When does the resistance of a thermistor decrease?what relationship does it have with temperature?

Answer 7

As the temperature increase, inverse proportion

Question 8

What is the relationship between the resistance on an LDR and light intensity?

Answer 8

Inverse proportion

Question 9

How do you calculate the total resistance in a series circuit?

Answer 9

R1+R2=R(total)

Question 10

In series and parallel , the potential difference is —- between components and has the ——- current in each component.

Answer 10

Shared, same

Question 11

Why does adding resistors to a parallel circuit reduce the overall resistance?

Answer 11

There are alternate routes in parallel circuits, to move past blockages (resistors) can go to other branches.