Equations - Paper 1 Flashcards

1
Q

Charge?

A

Current x time

Q = I t

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2
Q

Potential difference?

A

Current x resistance

V = I R

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3
Q

Electrical Power (In terms of potential difference and current)?

A

Potential difference x current

P = V I

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4
Q

Power (in terms of current and resistance)?

A

(Current²) x resistance

P = I²R

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5
Q

power (in terms of energy and time) ?

A

Energy transferred / time

P = E/t

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6
Q

Energy transferred (in terms of charges and potential difference)?

A

Charge x potential difference

E = Q V

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7
Q

Density?

A

Mass / volume

d = m/v

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8
Q

Period?

A

1 / frequency

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9
Q

Boyle’s Law?

this is on the formula sheet

A

pV = constant

this is on the formula sheet

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10
Q

Work done?

A

Force x distance moved

W = F D

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11
Q

Resistance?

A

Potential difference / Current

R = V/I

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12
Q

Efficiency?

A

Useful energy / Energy put in x100

E= useful/input x100

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13
Q

Kinetic energy?

A

1/2 x Mass x Speed²

Ek=1/2mv²

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14
Q

Gravitational potential energy?

A

Mass x Gravitational field strength x Height

Ep=mgh

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15
Q

Elastic potential energy?

this is on the formula sheet

A

1/2 x Spring constant x Extension²

Ee=1/2ke²

(this is on the formula sheet)

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16
Q

Specific heat capacity?

this is on the formula sheet

A

Energy / mass x temperature change

c = E / m x temp.

(this is on the formula sheet)

17
Q

Specific latent heat?

this is on the formula sheet

A

Energy / mass

l = E / m

(this is on the formula sheet)