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Fundamental Concepts in Electromagnetism Quiz

#1

What is the SI unit of electric charge?

Coulombs
Explanation

Unit for measuring electric charge.

#2

What is the relationship between the force experienced by a charge in an electric field and the magnitude of the charge and the strength of the field?

Directly proportional
Explanation

Relation between charge, field, and force.

#3

Which of the following quantities is a vector quantity?

Electric field intensity
Explanation

Vector nature of electric field intensity.

#4

What is the relationship between the force experienced by a charge moving perpendicular to a magnetic field and its velocity?

Directly proportional
Explanation

Relation between force and velocity.

#5

Which law describes the relationship between the voltage across a conductor, the current passing through it, and its resistance?

Ohm's Law
Explanation

Basic relation in electrical circuits.

#6

What is the relationship between the electric field and the electric potential at a point in space?

Electric field points towards lower potential
Explanation

Direction of electric field.

#7

Which law describes the relationship between an electric field and the electric charge it exerts a force on?

Gauss's Law
Explanation

Describes electric field lines.

#8

What is the formula for the magnetic field produced by a straight current-carrying wire?

B = μI/2πr
Explanation

Calculates magnetic field around a wire.

#9

Which electromagnetic phenomenon occurs when a conductor moving through a magnetic field induces an electric current in the conductor?

Electromagnetic induction
Explanation

Process of generating current in conductors.

#10

What is the formula for the force experienced by a current-carrying conductor in a magnetic field?

F = BILsinθ
Explanation

Expression for magnetic force on a wire.

#11

What does Lenz's Law state regarding the direction of an induced electromotive force (emf) and the change in magnetic flux?

The induced emf opposes the change in magnetic flux.
Explanation

Direction of induced emf.

#12

Which of the following electromagnetic waves has the highest frequency?

Gamma rays
Explanation

Highest frequency electromagnetic wave.

#13

Which of the following materials would most likely exhibit ferromagnetism at room temperature?

Iron
Explanation

Common ferromagnetic material.

#14

What is the relationship between the electric flux through a closed surface and the total charge enclosed by that surface according to Gauss's Law?

The electric flux is directly proportional to the total charge enclosed.
Explanation

Electric flux variation with enclosed charge.

#15

Which law describes the relationship between the magnetic field circulating around a closed loop and the electric current passing through that loop?

Ampere's Law
Explanation

Relates magnetic field and current in loops.

#16

What is the difference between a conductor and an insulator in terms of their behavior towards electric charges?

Conductors allow electric charges to move freely, while insulators do not.
Explanation

Conductivity difference in materials.

#17

What is the formula for the electromotive force (emf) induced in a coil with N turns rotating in a magnetic field with angular velocity ω?

EMF = NωB
Explanation

Formula for induced emf in rotating coil.

#18

What is the SI unit of magnetic flux density?

Tesla
Explanation

Unit for measuring magnetic field strength.

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