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.
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.
1 answer:
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Answer:
x = 7.14 meters
Explanation:
It is given that,
Current in wire 1,
Current in wire 2,
Distance between parallel wires, r = 25 cm
Let at P point the net magnetic field equal to 0. The magnetic field at a point midway between the is given by :
Let the distance is x from wire 1. So,
x = 7.14 meters
So, the magnetic field will be 0 at a distance of 7.14 meters from wire 1. Hence, this is the required solution.