The direction of Ampere force F is not only perpendicular to the magnetic field, but also perpendicular to the conducting wire, that is, f is perpendicular to the plane where Bi is, but the direction of B and I is not necessarily perpendicular
A line perpendicular to a plane is perpendicular to any line in the plane
Suppose the leg of the stool is f, and the ground is the plane of Bi. You put two wooden sticks as B or I. no matter how you put them, the two wooden sticks are perpendicular to the leg of the stool. You can have a try
If a 2-meter-long conducting wire with 1a is vertically placed in a uniform magnetic field with 0.5T magnetic induction, the ampere force on the conducting wire will be small
F =BIL =2*1*0.5=1
RELATED INFORMATIONS
- 1. In the uniform magnetic field with magnetic induction of 0.5T, there is an electrified wire AB which is perpendicular to the magnetic direction and 0.3m long. The current in the wire is 2a and the direction is a In the uniform magnetic field with magnetic induction of 0.5T, there is an electrified wire AB which is perpendicular to the magnetic direction and 0.3m long. The current in the wire is 2a and the direction is a to B. the magnitude and direction of Ampere force on the wire AB are calculated
- 2. A small section of electrified wire is 1 in length and 5A in current intensity. If it is placed at a certain point in the magnetic field and the magnetic field force is 0.1N, then the magnetic induction intensity at that point must be? To explain in detail, the answer is that B is greater than or equal to 2T. I think it should be less than or equal to 2T. Why?
- 3. In the uniform magnetic field with magnetic induction intensity of 4.0 * 10 ^ 2T, there is a 4cm long electrified straight wire AB perpendicular to the direction of magnetic field If the ampere force of AB is 1.0 * 10 ^ - 2n and the direction is perpendicular to the paper surface and outward, the magnitude and direction of the current in the wire are the same
- 4. An electrified wire is subjected to a force in a magnetic field, and the direction of the force follows______ Direction and direction______ It all has to do with the direction
- 5. How to judge the force direction of the electrified conductor in the magnetic field
- 6. How to distinguish the direction of magnetic field around the electrified straight wire
- 7. How does the magnetic field around an electrified straight wire generate The correct principle,
- 8. As shown in the figure, the smooth U-shaped metal guide rail MNN ′ m ′ is horizontally fixed in the vertical uniform magnetic field, the magnetic induction intensity is B, the width of the guide rail is l, and its length is long enough. A resistance of R is connected between M ′ and m, and the rest of the resistance is ignored. A metal bar AB with mass of M and resistance of R can just be placed on the guide rail and has good contact with the guide rail The results are as follows: (1) at the beginning of motion, what is the instantaneous current I in the rod and the instantaneous voltage u at both ends of the rod? (2) When the velocity of the rod decreases from v0 to V010, what is the Joule heat Q produced in the rod?
- 9. Put a parallel metal guide rail in the uniform magnetic field, and the guide rail is connected with the large coil m, as shown in the figure. Put a wire AB on the guide rail, and the magnetic induction line is perpendicular to the plane of the guide rail. In order to make the small closed coil n surrounded by M produce clockwise induced current, the motion of the wire may be () A. Uniform right movement B. accelerated right movement C. uniform left movement D. accelerated left movement
- 10. For the two parallel guide rails, the resistance is not included, the direction of uniform electric field is perpendicular to the paper surface and inward, the magnetic induction B = 0.5T, the conductor bar AB and CD are 0.2m, and the resistance is 0.2m 1 Ω, and the gravity is 0.1N. Now pull the conductor bar AB upward with force to make it rise at a uniform speed (the conductor bar AB and CD are in good contact with the guide rail). At this time, CD is still. When AB rises, what is the tension on AB, (please explain)
- 11. In the equatorial plane along the east-west direction to place a straight wire, through the west to east current, then this wire by the geomagnetic field action direction is what direction
- 12. A 2m long straight wire is horizontally placed along the east-west direction with the current of 1a. Try to calculate the ampere force on the wire in the geomagnetic field
- 13. The output power of a generator is 10kW, the output voltage is 500V, the total resistance of the conductor is 5 Ω, the power loss is 5% of the total power, and the voltage required by the user is 220V. The turn ratio of step-up transformer and step-down transformer is calculated
- 14. When the voltage at both ends of a resistance wire is u, the power consumed is p. if the voltage at both ends of the resistance wire is increased by one fifth, what is the original voltage?
- 15. The output power of a hydropower station is 20kW, the transmission voltage is 400V, and the total resistance of the wire is 0.5 Ω. What is the power loss of the transmission line? What is the electric power that users get?
- 16. A small hydropower station, the output power is 20kW, transmission voltage is 250V, if the total resistance of the transmission line is 0.5 Ω, then the loss of power on the transmission line It is 3200 W. if the transmission voltage is increased to 1000V, the electric power will be increased by W
- 17. When an electric furnace passes 4A current, it can produce 5.28 * 10 quartic J heat per minute. How about its electric power and resistance when the resistance wire is working?
- 18. The transmission voltage of a power station is 5000v and the transmission power is 500kW. The difference between the readings of electric energy meters installed at the beginning and end of the transmission line is 4800kwh in one day and night The power loss on the transmission line, the resistance and efficiency of the transmission line, and how much of the transmission voltage should be increased if the power loss on the transmission line is to be reduced to 2% of the transmission power
- 19. The resistance of the transmission line is 0.5 ohm, and the power station provides 105kW of electric power through the line with the voltage of 102kw, then the current and heat loss power in the transmission line will be reduced Isn't it possible to reduce the voltage if there is resistance on the transmission line?
- 20. The output power of a power plant is 1000 watts, and the resistance of the transmission line is 10 ohm. How much electric power does the user get