1_Magnetic field_Ampere force problem solving_Appendix

Problem solving

1. Determine the force with which a magnetic field with an induction of 10 mT acts on a conductor with a current of 50 A , if the length of the active part of the conductor is 0.1 m. The field and the current are mutually perpendicular.

2. What is the magnetic field induction in which a 0.5 H force acts on a conductor 20 cm long in active part ?The current in the conductor 2 A. The conductor is perpendicular to the induction of the magnetic field.

3. Find the length of the active part of the conductor, which is in a uniform magnetic field with an induction of 1.5 T, if a 4A current flows through the conductor and a force of 0.02H acts on it from the side of the field. The field and current are located at an angle of 45 ^{° to} each other.

4. What is the current strength in a conductor located at an angle of 60 ⁰ to the vector of magnetic induction, if it has a force of 0.425 N, the length of the active part of the conductor is 5 cm , and the modulus of the magnetic induction vector is 0.4 Tl?

5. At what angle is the conductor in a magnetic field with an induction of 2.6 T, if a current of 12 A flows through it , and the length of the active part of the conductor is 10 cm. Is a force of 1.56 N acting on the conductor in the field?

6. A horizontal conductor with a length of 20 cm and a mass of 4 g carries a current of 10 A. Find the induction (modulus and direction) of the magnetic field in which the conductor needs to be placed so that the force of gravity is balanced by the Ampere force.

7 *. Conductor ab of length l and mass m is suspended on thin wires. When current passes through it, it is deflected in a uniform magnetic field so that the filaments form an angle α with the vertical. Determine the magnetic field induction.

8**. On horizontal rails that are in vertical uniform ­ nom magnetic field, lies a steel bar, perpendicular to the rails. Bar length   a = 15 cm , mass m = 300 g, the coefficient of friction between the bar and the rails is 0.2.To bar budge on it is necessary to pass the current I = 40 A. What induction AT magnetic field?

9**. In a uniform magnetic field whose induction is 2 T and on ­ corrected at an angle of 30 ° to the vertical, a straight conductor with a mass of 2 kg is moving vertically upwards , through which a current flows 4 A. 3 seconds after the start of movement, the conductor has a speed of 10 m / s. Oprah ­ divide the length of the conductor.

Дескрипторы:

- записывает «Дано»;

- выражает значения величин в СИ;

- записывает формулу силы Ампера;

- выражает из формулы искомую величину;

- вычисляет искомую величину.