Electrical Quantities Flashcards
What is electrical current measured in
Amps (A)
What is an ammeter
It is a device which measures electrical current
Why is potential difference or voltage needed and what is it measured in
To make a current flow in a circuit. It is measured in volts (V)
What is a voltmeter and where is it placed in a circuit
It is a device played in parallel with a component to find the potential difference
What is the equation for energy
Energy = power x time
What is power measured in
Watts (W)
What is the equation for power
Power = current x voltage
What is a watt
A unit of power
What is the unit for electrical energy consumed in the home
Kilowatt- hours (kWh)
How do you find the kWh of an appliance
Find its power in kW and it’s time in hours
How do you calculate the cost of electricity
Cost of electricity = cost per kWh x number of kWh consumed
What is payback time
It is the time it takes to pay back for the appliance
What is power
The rate at which energy is transferred or work is done, measured in watts (W)
