Electricity and Magnetism

Front

What is the process of producing an electric current by moving a loop of wire through a magnetic field called?

Back

Electromagnetic induction.

Front

If the input voltage is 12V and the secondary coil has doubled the number of turns compared to the primary coil, what is the output voltage?

Back

24V.

Front

How can the magnetic field of an electromagnet be decreased?

Back

By decreasing the number of coils.

Front

What type of magnet's strength can be increased by adding turns of the coil?

Back

Electromagnet.

Front

Can a permanent magnet lose its magnetic behavior only if it is shattered?

Back

False.

Front

What is the relationship between the number of turns in a coil and the voltage produced in a transformer?

Back

The output voltage is proportional to the ratio of the number of turns in the secondary coil to the primary coil.

Front

What is the main difference between an electromagnet and a permanent magnet?

Back

An electromagnet's magnetic field can be turned on and off and its strength can be adjusted, while a permanent magnet has a constant magnetic field.

Front

What happens to the magnetic field strength of an electromagnet if the current flowing through it is increased?

Back

The magnetic field strength increases.

Front

What is the formula for calculating the magnetic force on a charged particle moving in a magnetic field?

Back

F = q(v × B), where F is the magnetic force, q is the charge, v is the velocity, and B is the magnetic field.

Front

What is Faraday's law of electromagnetic induction?

Back

It states that the induced electromotive force (emf) in a closed loop is proportional to the rate of change of the magnetic flux through the loop.