Power: Electrical
"rate of doing electrical work"
"rate of doing electrical work"
or
or
" rate of using electrical energy "
" rate of using electrical energy "
P = V * I = E / T
Power (P): Unit - Watt
Voltage (V): Unit - Volt Energy (E): Unit - Joule
Current (I): Unit - Ampere Time (T): Unit - Sec
Questions:
Questions:
The current flowing through an appliance connected to a 120-V source is 2 A. What is the power used by the appliance? How much energy dissipate by the appliance in one second?
My battery is 9V, 250mAh. My led specification is 2V, 20mA. If I connect my led with the battery by the help of a resistor rated 350 ohm. Find out the min power rating of the resistor and the energy dissipate by the resistor in 3 h? Find out the energy dissipate by the LED in 2h?
Related Topics:
Related Topics:
Power: Electrical.