Coils P and Q cach have a large number of turns of insulated wire. When switch S is closed, the pointer of galvanometer G is deflected toward the left. With S now closed, to make the pointer of G deflect toward the right one could
Correct answer: B. open S
- A. move coil P toward coil Q
- B. open S
- C. move coil Q toward coil P
- D. move the slide of the rheostat R quickly to the right
Explanation
The energy stored in a magnetic field in an inductor is given by the formula W = LI2, where:* W is the energy stored,* L is the inductance of the coil, and* I is the current flowing through the coil.
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Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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