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GENPHYSICS 2: Electromagnetism and Induction

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Questions and Answers

Which English physicist demonstrated that magnetic fields can produce voltage in a closed circuit?

Albert Einstein
Isaac Newton
James Clerk Maxwell
Michael Faraday (correct)

How is the induced emf affected by the number of turns in a coil?

It is directly proportional to the number of turns (correct)
It is inversely proportional to the number of turns
It is not affected by the number of turns
It is proportional to the square of the number of turns

What is the unit of measurement for magnetic flux?

Weber (correct)
Tesla
Volt
Ampere

When is the induced emf greatest in a coil?

When the change in time is smallest (D) Signup and view all the answers

What does the symbol Δt represent in the equation for induced emf?

Change in time (C) Signup and view all the answers

What is the significance of the angle θ in the equation for induced emf?

It represents the angle between the magnetic field and the normal to the coil (C) Signup and view all the answers

What is the relationship between the induced emf and the strength of the magnetic field?

The induced emf is directly proportional to the strength of the magnetic field (C) Signup and view all the answers

What is the role of a closed circuit in electromagnetic induction?

A closed circuit allows for the flow of induced current (B) Signup and view all the answers

What is the significance of the negative sign in Faraday's Law equation?

It indicates the direction of the induced emf, following Lenz's Law (B) Signup and view all the answers

How does the orientation of a coil relative to a magnetic field affect the induced emf?

The induced emf is influenced by the cosine of the angle between the magnetic field and the normal to the coil (B) Signup and view all the answers

What is the relationship between the area of a coil and the induced emf?

The induced emf is directly proportional to the area of the coil (D) Signup and view all the answers

What is self-inductance in a coil?

The ability of a coil to induce a voltage in itself when the current flowing through it changes (A) Signup and view all the answers

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