Question

4) (8 total points) Multiple choice questions i) (2 points) 3 long parallel current carrying wires have currents equal in magnitude but in the directions as shown. What direction is the magnetic force acting on the leftmost wire? a. Out of page b. Into page c. Up (t) d. Down (J) e. Left f. Right g. No Force ii) (2 points) A bearm of protons is accelerated to v-2.0x10° msec. They then enter a velocity selector with B-field of the 0.40 T. What E-field is needed so that the particles are undeflected? a. 8x104 N/C b. 8x10t v c. 8x104 CN d. 8x104 H e. 8x10 Tm2 iv) (2 points) The rectangular loop shown to the right is being pulled out of a magnetic field which points into the page. In what direction is the induced current in the loop as this happens? a. There is no induced current b. The induced current is clockwise c. The induced current is counterctockwise d. To the left on the top and bottom and up on the right side. e. To the right on the top and bottom and down on the right side v) (2 points) Darth Maul fires an electron with a speed of 3.5 km/sec into a region of space that has a uniform B-field of 0.80T perpendicular to the velocity. It then exits the field 4.0ms later. How fast will it be going as it exits the field? (the mass of an electron is 9.11x103 kg) Electrons of DOOM a. 3500 m/sec b. 6700 m/sec c. 1.4x10 m/sec d. 1.97x1012m/sec

Answer 1

Two wires carrying current in same direction attract each other and that in opposite directions repel each other.

cussnate Data イ(Q LSA Aichi ai) レーと 제 5。