# Formulas Flashcards Preview

## KS3 sciences > Formulas > Flashcards

Flashcards in Formulas Deck (37)
1
Q

formula for current

current, power, voltage

A

current = power / voltage

2
Q

formula for work done

work done, time, power

A

work done = power x time

3
Q

formula for voltage

current, power, voltage

A

voltage = power / current

4
Q

unit for power

A

watts (W) or kilowatts (kW)

5
Q

symbol for current

A

I

6
Q

unit for current

A

amps (A)

7
Q

symbol for power

A

P

8
Q

symbol for voltage

A

V

9
Q

unit for voltage

A

volts (V)

10
Q

formula for power

current, power, voltage

A

power = current x voltage

11
Q

formula for power

work done, time, power

A

power = work done / time

12
Q

formula for time

work done, time, power

A

time = work done / power

13
Q

unit for work done

A

kilowatt-hours (kWh) or units

14
Q

unit for time

A

seconds (s), minutes (m), or hours (h)

15
Q

symbol for time

A

t

16
Q

symbol for work done

A

E

17
Q

formula for cost

work done, cost, cost per unit

A

cost = work done x cost per unit

18
Q

one unit of energy is the same as…

A

one kilowatt of energy

19
Q

formula for cost per unit

work done, cost, cost per unit

A

cost per unit = cost / work done

20
Q

formula for work done

work done, cost, cost per unit

A

work done = cost / cost per unit

21
Q

one kilowatt is the same as…

A

one unit of energy

22
Q

unit for cost

A

pence or pounds

23
Q

formula for current

current, charge, time

A

current = charge /time

24
Q

formula for charge

current, charge, time

A

charge = current x time

25
Q

formula for time

current, charge, time

A

time = charge / current

26
Q

formula for resistance

p.d, resistance, current

A

resistance = p.d / current

27
Q

formula for voltage

energy, voltage/potential difference, charge

A

voltage (p.d) = energy / charge

28
Q

formula for energy

energy, voltage/potential difference, charge

A

energy = voltage (p.d) x charge

29
Q

formula for charge

energy, voltage/potential difference, charge

A

charge = energy / voltage (p.d)

30
Q

symbol for charge

A

Q

31
Q

Unit for energy

A

joules (J)

32
Q

OHM’s LAW

formula for potential difference

(current, potential difference, resistance)

A

p.d = current x resistance

33
Q

what is ohm’s law?

A

p.d = current x resistance

34
Q

formula for current

p.d, resistance, current

A

current = p.d / resistance

35
Q

unit for resistance

A

ohms (Ω)

36
Q

unit for charge

A

coulombs (C)

37
Q

formula for magnification

A

image size/ actual size