Question

5.Електроплитку з ніхромовою спіраллю, опір якої становить 22 Ом вмикають у мережу 220В. Обчисліть кількість теплоти, яка виділиться за 10 хв роботи:

Answer 1

Q=IUt=U^2t/R=220^2×10/22=22000Дж=22кДж

Answer 2

Calculation of Heat Generated by an Electric Stove

To calculate the amount of heat generated by an electric stove with a nichrome coil, we can use the formula:

Q = I^2 * R * t

Where: - Q is the heat generated (in joules) - I is the current flowing through the coil (in amperes) - R is the resistance of the coil (in ohms) - t is the time the stove is in operation (in seconds)

In this case, the resistance of the coil is given as 22 ohms and the voltage is 220V. We can use Ohm's law to calculate the current flowing through the coil:

I = V / R

Where: - V is the voltage (in volts)

Let's calculate the current first:

I = 220V / 22Ω = 10A

Now, we can calculate the heat generated over a period of 10 minutes (600 seconds):

Q = (10A)^2 * 22Ω * 600s

Simplifying the equation:

Q = 100A^2 * 22Ω * 600s

Q = 132,000 joules

Therefore, the amount of heat generated by the electric stove with a nichrome coil in 10 minutes of operation is 132,000 joules.