Electromagnetic Quiz Bee

Silver is BEST describe as a material having what?

• Low resistivity, low conductivity

• Low resistivity, high conductivity

• High resistivity, low conductivity

• High resistivity, high conductivity

A copper wire is cut such that it is now half its original length. What happens to its resistivity?

• It is halved.

• It is doubled.

• It is quadrupled.

• It remains the same.

What happens to the magnetic field intensity when you double your distance from a current-carrying wire?

• It is halved.

• It is doubled.

• It is quartered.

• It remains the same.

Alternating current is observed in the following objects EXCEPT what?

• Dry cells

• Generators

• Transformers

• AC can be observed in all devices above.

Who first showed that magnetism can cause electricity?

• Ampere

• Faraday

• Maxwell

• Oersted

What is the SI unit of the magnetic field intensity?

• Ohms

• Tesla

• Amperes

• Newtons

Which of the following, when increased, increases the magnetic field strength created by a wire?

• Length of the wire

• Current on the wire

• Resistance of the wire

• Temperature of the wire

Two light bulbs are connected in parallel. Which values between the two are equal?

• Voltage only

• Current only

• Both voltage and current

• Neither voltage nor current

What are the types of current on the primary and secondary coils of a transformer, respectively?

• AC and DC

• DC and AC

• AC on both coils.

• DC on both coils.

Which of the following is measured in Newtons?

• Voltage

• Electromotive force

• Potential difference

• None of the above