Question

Найти скорость изменения магнитного потока сквозь проводящий контур при возбуждении в нем эдс индукции 40 В. Варианты: 1)40 Вб/с; 2)20 мВб/с; 3)0,02 Вб/с; 4)80 Вб/с

Answer 1

E=dФ/dt
E=40 Вб/с   Ответ 1)

Answer 2

Calculation of the Change in Magnetic Flux

To calculate the change in magnetic flux through a conducting loop when an induced electromotive force (EMF) of 40 V is excited in it, we can use Faraday's law of electromagnetic induction. According to Faraday's law, the induced EMF in a conducting loop is equal to the rate of change of magnetic flux through the loop.

The formula to calculate the induced EMF is:

EMF = -dΦ/dt

Where: - EMF is the induced electromotive force (in volts) - dΦ/dt is the rate of change of magnetic flux (in webers per second)

In this case, the induced EMF is given as 40 V. We need to find the rate of change of magnetic flux.

Let's calculate the rate of change of magnetic flux:

EMF = -dΦ/dt

Rearranging the formula, we get:

dΦ/dt = -EMF

Substituting the given value of EMF as -40 V, we have:

dΦ/dt = -(-40) = 40 V/s

Therefore, the rate of change of magnetic flux through the conducting loop is 40 V/s.

The correct option is 1) 40 Vb/s.

Please let me know if you need any further clarification or assistance.