Flashcards in Equations - Paper 1 Deck (17)
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1
Charge?
Current x time
Q = I t
2
Potential difference?
Current x resistance
V = I R
3
Electrical Power (In terms of potential difference and current)?
Potential difference x current
P = V I
4
Power (in terms of current and resistance)?
(Current²) x resistance
P = I²R
5
power (in terms of energy and time) ?
Energy transferred / time
P = E/t
6
Energy transferred (in terms of charges and potential difference)?
Charge x potential difference
E = Q V
7
Density?
Mass / volume
d = m/v
8
Period?
1 / frequency
9
Boyle's Law?
(this is on the formula sheet)
pV = constant
(this is on the formula sheet)
10
Work done?
Force x distance moved
W = F D
11
Resistance?
Potential difference / Current
R = V/I
12
Efficiency?
Useful energy / Energy put in x100
E= useful/input x100
13
Kinetic energy?
1/2 x Mass x Speed²
Ek=1/2mv²
14
Gravitational potential energy?
Mass x Gravitational field strength x Height
Ep=mgh
15
Elastic potential energy?
(this is on the formula sheet)
1/2 x Spring constant x Extension²
Ee=1/2ke²
(this is on the formula sheet)
16
Specific heat capacity?
(this is on the formula sheet)
Energy / mass x temperature change
c = E / m x temp.
(this is on the formula sheet)
17