Formulas Flashcards

1
Q

Ohm’s Law

A

V = I x R

Voltage(V) = Current(A) x Resistance(Ohms)

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2
Q

Electrical Power

A

P = V x I

Power(W) = Voltage(v) x Current(A)

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3
Q

Energy

A

E = P x t

Energy(J) = Power(W) x Time(sec)

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4
Q

Work formula

A

W = F x d

Work(J) = Force(N) x Distance(m)

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5
Q

Force formula

A

F = M x a

Force = Mass(Kg) x Acceleration(ms-2)

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6
Q

Losses of a System formula

A

Losses = P(in) - P(out)

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7
Q

Efficiency of a system

A

n = (P(Out)/P(in)) x 100

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8
Q

Comparing resistances of conductors in terms of Length

A

R2 = (R1 x L2) / L1

Resistor 2(Ohms) = ( Resistor 1(Ohms) x Length 2(m) ) / Length 1(m)

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9
Q

Comparing resistances of conductors in terms of Cross Sectional Area

A

R2 = (R1 x A1) / A2

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