Question 4 (a) A plane of circular loop of wire with radius of 4.0 cm is parallel to a 0.87 T magnetic field. The loop c

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Question 4 A A Plane Of Circular Loop Of Wire With Radius Of 4 0 Cm Is Parallel To A 0 87 T Magnetic Field The Loop C 1 (57.01 KiB) Viewed 11 times

Question 4 (a) A plane of circular loop of wire with radius of 4.0 cm is parallel to a 0.87 T magnetic field. The loop carries a current of 3.0 A. Find the torque that acts on the loop. (2 marks) (b) Two long, parallel wires both with same length of 30 cm are separated by a distance of 10 cm as shown in Figure Q4(b). The currents /1-3.0 A and /2-2.5 A have the directions shown. Illustrate the magnitude and direction of the force exerted by each wire on a 30 cm length of the other. I 1₁-3.0 A 10 cm Figure Q4(b) 1-2.5 A An electron at point A in Figure Q41 has a speed of v= 1.41 x 10° ms¹¹. Find, 10.0 cm Figure Q41 (3 marks) (i) the magnitude and direction of the magnetic field that will cause the electron to follow the semi- circular path from A to B, and (3 marks) (ii) the time required for the electron to move from A to B (2 marks)