Electrictity

Question 1

What is a diode

Answer 1

A device which only allows current to flow one direction

Question 2

What is charge

Answer 2

A measure of the total current that flowed within a certain period of time

Question 3

Equation for charge

Answer 3

Current x time

Question 4

What happens with the potential difference , current , resistance in a series circuit

Answer 4

The potential difference is shared is shared across the components
The Current is the same across the board
The resistance is the sum of the resistance in all the components.

Question 5

What happens to the potential difference, current , resistance in a parallel circuit

Answer 5

Same potential difference across the board
Total current = sum of current in each component
More components = lower resistsnce

Question 6

How does the national grid work

Answer 6

Power station generates thermal energy and turns it into electrical energy
>
Step up transformer- increases voltage by 400,000
>
Pylons
>
step down transformer limits voltage to 250 to make it safe for our homes
>
Goes into town

Question 7

What is alternating current

Answer 7

The direction of the current is constantly swapping back and fourth
Changes from positive to negative constanly

Question 8

What is direct current

Answer 8

When the current is moving in one direction
Either positive or negative