Solve the questions please please please?? please please
Solution :
(4.) Difference between Energy and Power -
Energy is the ability to do work. It's unit is joules(J). Energy changes it's form from one to another. Various types of energy are kinetic, thermal, potential, gravitational, sound, electromagnetic, light, elastic, etc. Energy is can be stored which can be used in the future.
Power is the rate at which a work is done.
P = Work/time.
It's unit is watts (W) or joules/sec. Power cannot be transformed from one type to another. Different kinds of power are electric power, optical power, human power, etc. Power is not storable or cannot be stored.
(5.) We can find the amount of electricity or energy consumed by an appliance by using the formula
E = Power × Time
Example -
An electrical kettle is rated 220 W and 110 V. If the kettle is operated for 2 hours calculate the energy consumed by the kettle.
Here,
Power = 220 watts => 0.22 kW
time = 2 h
Energy = P × t
E = 0.22 × 2
E = 0.44 kWh or unit
Now,
1 kWh = 3.6 × 106 J
=> 0.44 × 3.6 × 106 J
=> 1584 × 103 J
Kindly post the different questions in different thread.
(4.) Difference between Energy and Power -
Energy is the ability to do work. It's unit is joules(J). Energy changes it's form from one to another. Various types of energy are kinetic, thermal, potential, gravitational, sound, electromagnetic, light, elastic, etc. Energy is can be stored which can be used in the future.
Power is the rate at which a work is done.
P = Work/time.
It's unit is watts (W) or joules/sec. Power cannot be transformed from one type to another. Different kinds of power are electric power, optical power, human power, etc. Power is not storable or cannot be stored.
(5.) We can find the amount of electricity or energy consumed by an appliance by using the formula
E = Power × Time
Example -
An electrical kettle is rated 220 W and 110 V. If the kettle is operated for 2 hours calculate the energy consumed by the kettle.
Here,
Power = 220 watts => 0.22 kW
time = 2 h
Energy = P × t
E = 0.22 × 2
E = 0.44 kWh or unit
Now,
1 kWh = 3.6 × 106 J
=> 0.44 × 3.6 × 106 J
=> 1584 × 103 J
Kindly post the different questions in different thread.