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Questions and Answers
What is the main factor that determines the amount of voltage produced in electromagnetic induction?
What is the main factor that determines the amount of voltage produced in electromagnetic induction?
- The shape of the wire
- The speed of movement (correct)
- The material of the wire
- The strength of the magnet
What is the formula for the magnetic field strength?
What is the formula for the magnetic field strength?
- Ф = BAsec θ
- Ф = BAcot θ
- Ф = BAcos θ (correct)
- Ф = BAtan θ
What is the direction of the induced voltage in a coil according to Faraday's Law?
What is the direction of the induced voltage in a coil according to Faraday's Law?
- Parallel to the magnetic field
- Perpendicular to the magnetic field (correct)
- Opposite to the magnetic field
- In the same direction as the magnetic field
What is the relationship between the change in magnetic flux and the emf induced in a coil?
What is the relationship between the change in magnetic flux and the emf induced in a coil?
What is the condition for inducing a voltage in a conductor according to electromagnetic induction?
What is the condition for inducing a voltage in a conductor according to electromagnetic induction?
What is the effect of the material of the conductor on the induced voltage?
What is the effect of the material of the conductor on the induced voltage?
What is the relationship between the change in time ∆t and the emf?
What is the relationship between the change in time ∆t and the emf?
How does the number of turns N affect the induced emf?
How does the number of turns N affect the induced emf?
In the given example, what is the change in flux ΔΦ?
In the given example, what is the change in flux ΔΦ?
What is the unit of the area of the loop A?
What is the unit of the area of the loop A?
What is the average value of B cos θ in the given example?
What is the average value of B cos θ in the given example?
What is the emf induced in the coil when a magnetic field of 0.200 T is changed at a rate of 1.13 x 10-2m2/s?
What is the emf induced in the coil when a magnetic field of 0.200 T is changed at a rate of 1.13 x 10-2m2/s?
What happens when the voltage source is turned on in a transformer?
What happens when the voltage source is turned on in a transformer?
What is the purpose of connecting an AC voltage source to a transformer?
What is the purpose of connecting an AC voltage source to a transformer?
What happens to the voltage in a transformer when the number of turns in the secondary coil is greater than in the primary coil?
What happens to the voltage in a transformer when the number of turns in the secondary coil is greater than in the primary coil?
What is the direction of the induced current in the secondary coil when the voltage source is turned off?
What is the direction of the induced current in the secondary coil when the voltage source is turned off?
Who stated that a magnetic field is created in any region of space where an electric field is changing with time?
Who stated that a magnetic field is created in any region of space where an electric field is changing with time?
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