physics

Question 1

what is the equation for charge flow?

Answer 1

charge flow = current x time

Question 2

what is the equation for potential difference ?

Answer 2

potential difference = current x resistance

Question 3

what are the units for charge flow?

Answer 3

coulombs C

Question 4

what are the units for time?

Answer 4

seconds s

Question 5

what is the unit for resistance?

Answer 5

ohms

Question 6

what is a component?

Answer 6

something in an electrical circuit ( like a bulb or cell)

Question 7

what are the units for power?

Answer 7

watts W

Question 8

what is charge?

Answer 8

a property of the particles, something that can have a positive or negative charge.

Question 9

what is the unit for current?

Answer 9

Amps A

Question 10

What is potential difference?

Answer 10

The energy transferred to or from charges (electrons) as they pass through a component

Question 11

What is the unit for energy?

Answer 11

Joules J

Question 12

what is power?

Answer 12

power is how much energy is transferred or work is done per second.

Question 13

what is the equation for power?

Answer 13

power = potential difference x current

Question 14

what is the units for potential difference?

Answer 14

Volts V

Question 15

what is the national grid?

Answer 15

The national grid is a system of cables and transformers linking power stations to consumers ( like houses and businesses)

Question 16

what is current like in series?

Answer 16

current in series will be the same everywhere because it’s the only route to follow

Question 17

what is current like in a parallel circuit?

Answer 17

current in parallel splits across branches so current is lower

Question 18

what do step up transformers do?

Answer 18

step up transformers increase potential difference