Question

Катушка из 1000 витков, площадью 5 см2 каждый, внесена в однородное магнитное по-ле. Индукция магнитного поля уменьшилась с 2,3 Тл до 1,8 Тл. В проводнике был индуцирован заряд 5 мКл. Сопротивление катушки равно …

Answer 1

2.300-1.800тл=500
1000-500/2=450

Answer 2

Calculation of the Resistance of the Coil

To calculate the resistance of the coil, we need to know the number of turns, the area, and the resistivity of the material used in the coil. Unfortunately, the number of turns and the resistivity are not provided in the question. Therefore, we cannot calculate the resistance of the coil with the given information.

Calculation of the Change in Magnetic Flux

The change in magnetic flux can be calculated using Faraday's law of electromagnetic induction, which states that the induced electromotive force (EMF) is equal to the rate of change of magnetic flux through a circuit. The formula for calculating the change in magnetic flux is:

ΔΦ = B * A

Where: - ΔΦ is the change in magnetic flux - B is the magnetic field strength - A is the area of the coil

In this case, the initial magnetic field strength (B) is 2.3 T and the final magnetic field strength is 1.8 T. The area of the coil (A) is given as 5 cm², which is equal to 0.0005 m².

Using the formula, we can calculate the change in magnetic flux:

ΔΦ = (1.8 T - 2.3 T) * 0.0005 m²

Calculating the value:

ΔΦ = -0.5 T * 0.0005 m²

ΔΦ = -0.00025 Wb

Therefore, the change in magnetic flux is -0.00025 Weber.

Calculation of the Induced EMF

The induced electromotive force (EMF) can be calculated using Faraday's law of electromagnetic induction, which states that the induced EMF is equal to the rate of change of magnetic flux through a circuit. The formula for calculating the induced EMF is:

EMF = -N * ΔΦ / Δt

Where: - EMF is the induced electromotive force - N is the number of turns in the coil - ΔΦ is the change in magnetic flux - Δt is the time interval over which the change in magnetic flux occurs

In this case, the change in magnetic flux (ΔΦ) is -0.00025 Wb, and the time interval (Δt) is not provided in the question. Therefore, we cannot calculate the induced EMF with the given information.

Calculation of the Induced Charge

The induced charge can be calculated using the formula:

Q = EMF * C

Where: - Q is the induced charge - EMF is the induced electromotive force - C is the capacitance of the conductor

In this case, the induced charge (Q) is given as 5 mC (milliCoulombs). However, the capacitance of the conductor (C) is not provided in the question. Therefore, we cannot calculate the induced charge with the given information.

In summary, based on the information provided, we cannot calculate the resistance of the coil, the induced EMF, or the induced charge without additional information such as the number of turns, the resistivity of the material, the time interval, and the capacitance of the conductor.