Grade 12 Physics Lenz law, Inductance, Generators & motors

For a positive charge moving in a circular path in an electric field, the induced potential difference can be expressed as (∆𝑽𝐢𝐧𝐝 = 𝟐𝝅𝒙𝑬). What does 𝒙 represent?

• The radius of the circular path

• Induced electric field

• The magnitude of the charge

• Induced electric current

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• 0.75 m

• 0.23 m

• 13.2 m

• 0.51 m

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A solenoid's inductance is equal to (𝑳). Suppose that the length of the solenoid is reduced to half its original length, and the average cross-section radius is increased to be double, while the number of turns remains unchanged. How much the inductance becomes?

• 4L

• 2L

• 1\2L

• 8L

What does the unit of inductance Henry (H) equal?

• Tm^2/A

• Am^2/T

• A^2 m^2/ T

• T^2 m/A