A circuit consists of a conducting movable bar and a lightbulb connected to two conducting rails as shown in the figure below. A

Question

2 years ago

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A circuit consists of a conducting movable bar and a lightbulb connected to two conducting rails as shown in the figure below. A

n external magnetic field is directed perpendicular to the plane of the circuit. Which of the following actions will make the bulb light up? (Select all that apply.)
The bar is moved to the left.
The bar is moved to the right.
The magnitude of the magnetic field is increased.
The magnitude of the magnetic field is decreased.
The bar is lifted off the rails.

Physics

1 answer:

IrinaVladis [17] · Answer 1 · 2022-07-27T02:34:59+03:00

Moving the bar to the left or the right will cause emf to be generated, making the bulb light up. The first two options are correct.
Moving parallel to the field or not moving at all and increasing or decreasing the intensity of the field will not make the bulb light up because no current will be induced.