Question

practice Assignment Gradebook ORION Downloadable eTextbook onment PRINTER VERSION RACK NEXTE Pool 22.1: A bar magnet is moving toward a solenoid of wire as shown at a c... A bar magnet is moving toward a solenoid of wire as shown at a constant speed v. The ends of the wire are connected across a light bulb as shown. Which one of the following statements is false concerning this situation as the magnet moves toward the solenoid? The greater the speed is that the magnet moves, the larger the emf induced in the solenoid is. The current through the light bulb is constant with time. If the south end of the magnet were moving toward the solenoid instead of the north end, the direction of the current in the circuit would be reversed. If the magnet were held stationary inside the solenoid, no light would be emitted from the light bulb. The voltage across the light bulb increases with time. By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instructor

Answer 1

Option 2 is false

North Pole is moving towards the solenoid, so magnetic field due to manget is towards left. So as it is moving closer to solenoid, flux linked with the solenoid increase and it will induce a current in the circuit which will oppose the increase in flux, so current through bulb would be increasing in time, it won't be constant. Also if instead of north pole, south pole was moving towards solenoid, current would be induced in reverse direction. And if magnet was held stationary inside solenoid, there will be no flux change through solenoid as hence no current would be induced in the circuit and light bulb won't glow.