please answer all questions thank you

Question 9 1 pts How much current must pass through a 1000 turn toroid with a diameter of 8 cm to generate a 30 mT magnetic field at the center? O 6A O 2 A O 4 A O 8 A Question 10 1 pts A solenoid 32 cm long is wound with 2000 turns of very thin wire. What strength magnetic field is produced at the center of the solenoid when a current of 7 mA flows through it? O 55 HT 106 NT O 13 MT O 23 HTWhen two long parallel wires carry unequal currents, the magnitude of the magnetic force that one wire exerts on the other is F. If the current in both wires is now doubled, what is the magnitude of the new magnetic force on each wire? O 2F OF/4 OF/2 O 4F Question 2 1 pts A proton moves with a speed of 6 x 10 5 m/s along the +x-axis. It enters a region where there is a magnetic field of 3.3 T, directed at an angle of 35 relative to the direction of the velocity. Calculate the magnitude of the acceleration of the proton. O 2.9 x 1010 m/s2 O 1.1 x 1014 m/s2 3.6 x 1012 m/s2 O 7.4 x 1012 m/s2 What is the force per meter on a straight wire carrying 2 A when it is placed in a magnetic field of 0.080 T so that the wire makes an angle of 55 with respect to the magnetic field lines. O 0.13 N/m O 2.31 N/m O 1.67 N/m O 0.76 N/m Question 4 1 pts Alpha particles have a charge of +2e and a mass of 6.64 x 10"27 kg. Suppose an alpha particle is accelerated by an unknown electric potential into a region of uniform magnetic field. The magnetic field is perpendicular to the velocity of the particle, and has magnitude 1 T. Approximately how long does it take an alpha particle to make one complete circle in the final orbit? O 2.6 x 107s O 6.8 x 107 s O 4.7 x 10-5 s O 1.3 x 10'sTwo long parallel wires carry currents of 2 A and 1 A in the same direction. The wires are separated by a distance of 60 cm. What is the magnitude of the magnetic field midway between the two wires? O 3.18 x 106 T O 2.97 x 106 T O 1.34 x 109 T O 6.67 x 107 T Question 6 1 pts What is the approximate magnetic moment of a circular loop having 350 turns that carries 10 mA, if the diameter of the loop is 10 cm? O 6.2 x 103 Am2 O 1.4 x 10"4 A-m2 O 2.7 x 10 3 A.m2 3.8 x 10 3 A.m2 A proton is accelerated from rest through a potential difference of 1.25 kV. It enters a region where a uniform 3 mT magnetic field is perpendicular to the direction of the proton's velocity. What is the radius of the circular path that the proton will follow? O 0.45 m O 2.05 m O 1.7 m O 1.15 m Question 8 1 pts When you triple the number of windings in a toroidal solenoid while keeping all other properties constant, the magnetic field at the center of the solenoid will O Double Be cut in half O Quadruple O Triple