Test 5

When a material has no electrical resistance it is

a superconductor

Moving electric charges will interact with

an electric field or a magnetic field

A volt is defined as

a joule per coulomb

Electrons are made to flow in a wire when there is

a potential difference across its ends

The unit of electric charge, the coulomb, is the charge on

a specific large number of electrons

In an AC circuit, the electric field

changes magnitude and direction with time

Magnetic field lines about a current-carrying wire

circle the wire in closed loops

Heat a copper wire and its electric resistance

increases

A 10-ohm resistor has a 5-A current in it. What is the voltage across the resistor?

more than 20 V

The source of all magnetism is

moving electric charge

A transistor is an example of a

semiconductor

An iron rod becomes magnetic when

the net spins of its electrons are in the same direction

Paper plates don't heat in a microwave because

**not that 'paper contains water moleules'

Which statement is correct?

Charge flows in a closed circuit

Which force binds atoms together to form molecules?

electrical

In an electrically neutral atom the number of protons in the nucleus is equal to the number of

electrons that surround the nucleus

Which pole of a compass needle points to a south pole of a magnet?

north pole

The force between two charged particles depends

on the amount of charge on the two particles and their distance from each other.

Strip electrons from an atom and the atom becomes a

positive ion

Induction is when

you bring a charged object near another object and cause a movement of charge.