What are the answers

11. A bar magnet is moving towards a solenoid as shown. What is the direction of the field produced by the induced current at the point P inside the solenoid? (A) Left B) Right N C) Down (D) Up G X 12. A charged particle of 1.35 x 107 C moves with a speed of 3.0 x 104 m/s perpendicular to a uniform magnetic field of 0.40 T. What is the magnitude of the magnetic force on the charged particle? (A) 1.6 x 10-3 N (B) 2.5 x 10-3 N (C) 4.3 x 105 N (D) 5.4 x 105 N 13. A bar magnet is pulled upwards away from the center of a metal ring, as shown in the diagram. What happens while the magnet is moving? (A) An induced current will flow clockwise through the ring (when viewed from the top). B) An induced current will flow counterclockwise through the ring (when viewed from the top). (C) No current will be induced in the ring until the magnet stops. (D) The magnet tends to experience a magnetic force of repulsion away from the ring. 14. Two hallow-core solenoids, X and Y, are connected by a wire, as shown in the diagram provided. Two bar magnets 1 and 2, are suspended just above the solenoids. What will happen to magnet 2 if the south pole of magnet 1 is dropped through solenoid X? Magnet 1 Magnet 2 (A) Attracted by a magnetic force toward solenoid Y. (B) Attracted by an electric force toward solenoid Y. S N (C) Repelled by a magnetic force away from solenoid Y. (D) Repelled by an electric force away from solenoid Y. Solenoid X Solenoid Y 15. A solenoid is surrounded by four compasses as shown. Which compass reading is correct? B ( A) A (B) B (C) C AK (D) D B