Page 139 - Physics Form 5 KSSM_Neat
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Games https://bit. ly/3loWu0Y E t V R = I P = V 2 R CHAPTER 3
Electricity
Interactive Interactive Electrical power, P = Relationship between P, V and I, P = VI P = I 2 R Cost of energy consumption = unit (kWh) × cost per unit Energy usage saving measures
Electrical Energy and Power Electrical energy, E = VIt
Electromotive Force (e.m.f.) and Internal Resistance Internal resistance Voltage drop, Ir = Ԑ – V
Wire resistance,
Electricity Chain KEMENTERIAN PENDIDIKAN MALAYSIA
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A
R =
e.m.f., E Ԑ = Q The cross-sectional area of a wire
Resistance Ohmic conductors and non-ohmic conductors Factors that affect resistance The length of a wire Resistivity Resistivity applications Heating elements Electrical wiring Resistivity of Conductor Non-conductor Semiconductor Superconductor
Current and Potential Difference Potential difference, V = W Q • F • q • • • V d • • • •
oncept Current, I = Q t Electric field Electric field strength, electric force per unit charge, E = Electric field strength between two parallel plates, E = Behaviour of charged particles in an electric field
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