Question

Магнитный поток пронизывающий контур катушки состоящей из 53 виктов равномерно меняется на 7, 8 мВб найти время уменьшения магнитного потока и силу тока в катушке если в катушке индуцирует ЭДС индукции 0, 53 и ее сопротивление равно 0,12 Ом

Answer 1

Закон ЭМИ
E=NdФ/dt
dФ =7,8мВб
N=53
Е=0,53B
Выражаем время

dt=NdФ/Е
dt=53×7,8*10^-3/0,53=0,78с Ответ

Ищем силу тока
Е=IR
I= Е/R
I=0,53/0,12=4,42А Ответ

Answer 2

Calculation of Time for Decrease in Magnetic Flux

To find the time for the decrease in magnetic flux, we can use Faraday's law of electromagnetic induction, which states that the induced electromotive force (EMF) in a closed loop is equal to the rate of change of magnetic flux through the loop.

The formula for Faraday's law is:

EMF = -N * dΦ/dt

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

In this case, the magnetic flux through the coil is changing uniformly by 7.8 mWb (milliwebers) and the number of turns in the coil is 53.

Let's calculate the time for the decrease in magnetic flux:

EMF = -N * dΦ/dt

-0.053 V = -53 * (7.8 * 10^-3 Wb) / dt

Simplifying the equation:

dt = (53 * (7.8 * 10^-3 Wb)) / 0.053 V

Using the given values, we can calculate the time for the decrease in magnetic flux.

Calculation of Current in the Coil

To find the current in the coil, we can use Ohm's law, which states that the current flowing through a conductor is equal to the voltage across the conductor divided by its resistance.

The formula for Ohm's law is:

I = V / R

Where: - I is the current flowing through the coil (in amperes) - V is the voltage across the coil (in volts) - R is the resistance of the coil (in ohms)

In this case, the induced electromotive force (EMF) in the coil is 0.53 V and the resistance of the coil is 0.12 Ω.

Let's calculate the current in the coil:

I = V / R

I = 0.53 V / 0.12 Ω

Using the given values, we can calculate the current in the coil.

Please note that the calculations provided above are based on the information given in the question.