Electricity — Formula Sheet
ICSE · Class 8 · Physics
10 formulas from Electricity (ICSE Class 8 Physics) on one page, grouped by topic. Covers Electroscope, Lightning, and Lightning.
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Formulas and Key Relations
Household Electricity
W = QV
I = Q/t
Q = It
W = VIt
P = W/t = VI
Power, Energy and Electricity Bill
Energy (in kWh) = Power (in kW) × time (in h)
Electrical energy consumed (general): Energy (in kWh) = Power (in watt) × time (in hour) / 1000 = V × I × t / 1000
Electrical energy for multiple appliances = Number × power × time / 1000
1 kWh = 3.6 × 10^6 J.
Energy in kWh = Power in kW × time in h.
Full sheet with units and worked examples
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