Question

3. A long straight verticalement of wire B s straight vertical segment of wire traverses a magnetic field of magnitud 2 .0 T in the direction shown in the diagram. field is 0.060 m. When the switch is closed, a current of 1- e direction shown in the diagram. The length of the wire that lies in the magica 4.0 A flows through the wire, from m. When the switch is closed a current of Po to point P. Which one of the following statements concerning the effect of the magica force on the wire is true? A) The wire will be pushed to the left. B) The wire will be pushed to the right. C) The wire will have no net force acting on it. D) The wire will be pushed downward, into the plane of the paper. T E) The wire will be pushed upward, out of the plane of the paper. EEN 4. A long, straight wire carries a 10.0-A current in the +y direction as shown in the figure. Next to the wire is a square copper loop that carries a 2.00-A current as shown. The length of each side of the square is 1.00 m. 4a. What is the magnitude of the net magnetic force that acts on the loop? A) 8.0 x 10 'N B) 1.1 x 10-5N -1.20 m y C) 1.4 x 10-5N D) 1.7 x 10-SN 10.0 AV E) 2.3 x 10-SN 2.00 4b. What is the direction of the net magnetic force that acts on the loop? A) +x direction B) - direction C) +y direction D) -y direction E) 30° with respect to the +x direction

Answer 1

4(b) Net magnetic force is along -ve X direction. Option (B)

using force is downtion o 3. B =2.00 (Right to left) length of wire e=0.06om Be current in it į I=4.04 force on wire į ² = Il y B . using. Fleming's left hand sile, direction of this force i į dorin ward into the plane . of paper hence option o r correct 4. (a) Current I, = 10.04 110.00 Net force F=F,-Fee: foto 21, 122, a ? = 25,1,4 [ 6.2 he] = 16x2810X2X100 [no-] = 4x106(5-5) = 25 x 4X106N F = 1.7.8105N option ® IL = 42.00 A Me 21, I2 / 1 Mf 2 61.oomt