Prokofiev VL - solution of the entire version 10 on the

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Task 2.10
Two identical charges are in the air at a distance of 0.1 m from each other. The field strength in
A point removed at a distance of 0.06 m from one and 0.08 m from another charge is equal to 10 kV / m. Identify
The field potential at this point and the value of the charges.

PROBLEM 2.20
The charge of 1 nC is at a distance of 0.2 m from an infinitely long uniformly charged filament. Under
The charge of the filament field moves by 0.1 m. Determine the linear density of the filament charge, if
The work of the forces is spinning equal to 0.1 μJ.
Task 2.30
Under the action of an attractive force of 1 mN, the dielectric between the capacitor plates is under
Pressure of 1 Pa. Determine the energy and bulk density of the energy of the capacitor field, if the distance
Between its 1 mm.

Task 2.40
Two identical current sources are connected in one case in series, in the other - in parallel and
Are closed by an external resistance of 1 ohm. At what internal resistance of the source, the current in
The external chain will be the same in both cases?

Task 2.50
A square frame with a side of 0.2 m flows current, which creates a magnetic field in the center of the frame
With a tension of 4.5 A / m. Determine the current in the frame.

Task 2.60
A homogeneous magnetic field with a strength of 900 A / m acts on the conductor placed in it
Length of 25 cm with a force of 1 mN. Determine the current in the conductor if the angle between the directions of the current and
The induction of the magnetic field is 45 °.
Task 2.70
By the condition of problem 69, we determine the charge that passed through the solenoid after it was turned off.

Task 2.80
The coil of the solenoid has a resistance of 10 Ohm. What is its inductance, if the current passes through
0.05 s in it is allocated the amount of heat equivalent to the energy of the magnetic field of the solenoid?

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