Magnetic Effect of Electric Current Quiz

What is the cause of the magnetic field around a current-carrying conductor?

• Electric field

• Magnetic charges

• Flow of electrons

• Gravitational force

The strength of the magnetic field produced by a current-carrying conductor depends on:

• Length of the conductor

• Type of material

• Current flowing through the conductor

• All of the above

What is the SI unit of magnetic field strength?

• Ampere

• Weber

• Tesla

• Coulomb

The magnetic field inside a current-carrying solenoid is:

• Zero

• Constant

• Weaker at the center

• Stronger at the center

The device used to detect the direction of a current-carrying conductor in a magnetic field is called:

• Ammeter

• Voltmeter

• Galvanometer

• Rheostat

Which rule is used to find the direction of the magnetic field around a current-carrying conductor?

• Ampere's Law

• Faraday's Law

• Fleming's Left-Hand Rule

• Fleming's Right-Hand Rule

What happens to the strength of the magnetic field when the current through a wire is increased?

• Increases

• Decreases

• Remains the same

• Becomes zero

In electromagnetic induction, the direction of the induced current is given by:

• Lenz's Law

• Ohm's Law

• Joule's Law

• Hooke's Law

What is the role of the soft iron core in an electromagnet?

• Increases resistance

• Decreases magnetic strength

• Enhances the magnetic field

• Reduces the number of turns

The phenomenon of the induction of an electric current in a coil due to a change in magnetic field is known as:

• Electromagnetic induction

• Magnetic induction

• Electric induction

• Faraday's induction