Practical Electricity Flashcards
1
Q
Define Electrical Power (Scalar), P
A
It’s the rate of electrical energy converted to other forms of energy
2
Q
SI Unit of Power
A
W (watt)
3
Q
Formulas of Power (3 formulas)
A
P = VI = I²R = V²/R
4
Q
One watt is defined as…
A
the power delivered when one joule of energy is converted in one second.
5
Q
Electrical Energy is a scalar quantity with its symbol being E.
Express the 4 formulas for calculating energy in terms of I (current), R (resistance), V (potential difference) and t (time).
A
E=Pt, E=VIt, E=I²Rt, E=V²t/R
6
Q
SI Unit of Electrical Energy
A
J (joule)
7
Q
One kWh is defined as…
A
the amount of electrical energy used by a 1 kW device in one hour.
