Electricity and Magnetism Test Review

Front

What is the purpose of improving insulation in a house?

Back

To keep the house from overheating by reducing heat transfer.

Front

What is the formula to calculate current (I) in a circuit?

Back

I = V/R, where I is current in amps, V is voltage in volts, and R is resistance in ohms.

Front

What is ferromagnetism?

Back

Ferromagnetism is a phenomenon where certain materials exhibit strong magnetic properties due to the alignment of electron spins.

Front

What is true about electric charge?

Back

Electrical forces act at a distance.

Front

What is the term for the force that charges exert at a distance?

Back

Electric field.

Front

What is charging by induction?

Back

Charging by induction is the process of charging an object without direct contact, typically involving the influence of an electric field.

Front

What happens to electrons in ferromagnetic materials?

Back

Electrons align their spins in the same direction, creating a strong magnetic field.

Front

What is the relationship between voltage, current, and resistance?

Back

Ohm's Law states that V = I * R.

Front

What is the unit of electric current?

Back

Ampere (A).

Front

What is the effect of opposite electric charges?

Back

Opposite electric charges attract each other.