السلام عليكم ورحمة الله وبركاته
بصراحه انا سجلت عشان شفت تفاعلكم بالمنتدى واتمنى تساعدوني عندي اسأله واتمنى منكم مساعدتي بحلها
1- A wire has a current of 12.5 A. It goes east to west. The magnetic field goes south to north and is horizontal. The magnetic field strength is 55 mT. Find the force acting on a 25cm length of wire.
2- A long straight wire has a current of 1.5 A. Find the magnitude of the magnetic field at a point that is 5.0 cm from the wire.
3- A current of 17.0 mA is maintained in a single circular loop with a circumference of 2.00 m. A magnetic field of 0.800 T is directed parallel to the plane of the loop. What is the magnitude of the torque exerted by the magnetic field on the loop?
4- A proton with a speed of 3.5 × 106 m/s is shot into a region between two plates that are separated by a distance of 0.23 m. A magnetic field exists between the plates, and it is perpendicular to the velocity of the proton. What must be the magnitude of the magnetic field so the proton just misses colliding with the opposite plate?
5- A horizontal wire of length 0.53 m, carrying a current of 7.5 A, is placed in a uniform external magnetic field. When the wire is horizontal, it experiences no magnetic force. When the wire is tilted upward at an angle of 19°, it experiences a magnetic force of 4.4 × 10-3 Determine the magnitude of the external magnetic field.
6- A square coil of wire containing a single turn is placed in a uniform 0.25-T magnetic field, as the drawing shows. Each side has a length of 0.32 m, and the current in the coil is 12 A. Determine the magnitude of the magnetic force on each of the four side
7- Two pieces of the same wire have the same length. From one piece, a square coil containing a single loop is made. From the other, a circular coil containing a single loop is made. The coils carry different currents.When placed in the same magnetic field with the same orientation, they experience the same torque. What is the ratio (Isquare/Icircle) of the current in the square coil to the current in the circular coil?
مشكورين (f)