Calculation of induction cooker Operation manual of induction cooker: Rated voltage: 220 V rated power: 2200 w Applicable containers: pig iron pot, stainless iron pot and enamel pot with flat bottom and 12-28cm diameter Safety note: please use the socket above 10A separately 1. Why to use more than 10A socket alone? Please explain by calculation 2. The induction cooker works normally for 30 minutes, and the consumed electric energy is______ KWh______ J.

Calculation of induction cooker Operation manual of induction cooker: Rated voltage: 220 V rated power: 2200 w Applicable containers: pig iron pot, stainless iron pot and enamel pot with flat bottom and 12-28cm diameter Safety note: please use the socket above 10A separately 1. Why to use more than 10A socket alone? Please explain by calculation 2. The induction cooker works normally for 30 minutes, and the consumed electric energy is______ KWh______ J.

I = P / u = 10
Q=2200*30*60J
Q/3.6*10^6 kwh

Xiao Ming wants to know the electric power of an induction cooker at home. He uses an energy meter connected to his home circuit to measure it
1. What instrument does he need besides an energy meter?
2. Help him design the experiment plan and write the experiment steps briefly!?

1. A stopwatch
2. Turn off all electrical appliances at home, only leave the induction cooker running, observe the number of turns of the aluminum plate of the electric energy meter in 1min, according to the data on the electric energy meter (Xres / kW. H), use 1 * x (the number of turns of the aluminum plate of the electric energy meter in 1min) to get the electric energy consumed, and then divide this data by 60s to get the electric power of the Induction Cooker!

A lamp connected to a constant voltage power supply, its power is 100W. If the lamp is connected to a long wire, and then connected to the same power supply, the known power loss on the wire is 9W, then the actual power consumption of the lamp is ()
A. 91wb. Less than 91wc. More than 91wd. Insufficient conditions, unable to determine

If the wire resistance is ignored, the power of the lamp connected to the constant voltage power supply is 100W; because the wire and the bulb are in series, when the wire resistance is larger, that is, the resistance in the circuit becomes larger, from P = u2r, the total power consumed by the circuit becomes smaller, that is less than 100W, while the power consumed by the wire is 9W, so the actual power of the bulb can only be less than 91W

Electric power and energy meter
1. Electric work: what is electric work and what is it expressed by? The process of electric current doing work is what can be transformed into why
2. Formula: what, that is, the work done by the current on a certain circuit, is equal to the product of what at both ends of the circuit, what and what in the circuit
Unit: what, what. 1 kwh = what focal = what degree
4. Watt hour meter: it is an instrument to measure what. Connect the watt hour meter to the circuit. What the counter of the watt hour meter reads twice in succession is the power consumption during this period

Work done by current w electric work
W = uit = Pt total work P and t
3.6 times 10 to the sixth power 1 degree
The present minus the past