physics electricity

Electric current which requires power source and wires

• Series
• current flow is the same
• single loop

• Parallel
• current flow may be different,
• current flowing through each branch is lower than the current from source

• Rate of flow of electric charge
• measured in A amperes using a ammeter must be connected in a series
• recorded to 2 decimal places
• V/R= I (current = voltage/resistance).

• amount of energy needed to move one unit charge of electricity
• measured in volts (V) using voltmeter
• 
• must be in a parallel circuit
• recorded to 2 decimal places
• V= R/ I ( resistance/ current = voltage).

• resist the flow of current
• in ohms Ω
• V / I = R (voltage / current = resistance).

• total resistance in series
• R_T= R₁+R₂+R₃...

• Total resistance in parallel
• 

• P= voltage*current
• measured in watts

• electrical energy= power (watts) * time (seconds)
• or voltage* current * time
• Measured in joules J

• 1000W = 1kW
• energy consumed(kWh) = power(kilowatt/ kW)* time(hour)
• Cost = energy consumed(kWh) * cost per unit

Frayed wire - insulation torn. Electric shock

Overloading - Fire

using wet appliances - Electric shock

live wire is of high voltage. if it goes over the voltage, the fuse will melt, thus it will be a open circuit with no electric current flowing

• electrolysis
• decomposition of compound by an electric current
• used to break down water into hydrogen and oxygen
• oxygen at positive and hydrogen at negative

• electroplating
• used to coat an object with a thin layer of material usually metal so that appearances are improved or to protect it from corrosion
• material is at positive