Physcial Science Quiz 6

Which of the following units are measures of time rates?

Amp and Watt

Which of the following is a measure of electrical work ?

kWh

A 1300 watt hair blow dryer is designed to operate on 120 volts. How much electrical current does the dryer require?

11 A

What current would flow between two points in a electric circuit with a potential difference of 120V and a resistance of 30 ohm?

4 A

A positive and a negative charge are initially 10 cm apart. When they are moved away from each other so that they are 20 cm apart, the force between them is

4 times smaller than before.

A step-up transformer has 5 loops on its primary coil and 20 loops on its secondary coil. If the primary coil is supplied with an alternating current at 120 volts, what is the voltage in the secondary?

480 V

An electric current is measured is units of

Amps

What travels through a conductor at near the speed of light when a current in established ?

An electric Field

In a electric current the electrons are moving ?

At a very slow rate

How does an electron acquire a negative charge ?

Charge is a fundamental property of an electron.

A Coulomb is a unit of electrical

Charge.

If an electric charge is somehow suddenly neutralized, the electric field that surrounds it will

Collapse inward at the speed of light.

A quantity of electric charge is measured in a unit called a (an) ?

Coulomb

An Amp is a unit of electrical

Current

Electrical, light, and chemical phenomena all involve movement or interactions of which part of an atom ?

Electrons

Which of the following is most likely to acquire an electrostatic charge ?

Objects that are electrical nonconductors.

A volt is a unit of electrical

Potential Difference.

If you Multiply amps times volts the answer will be in units of

Power

The unit that describes the potential difference that occurs when a certain amount of work is used to move a certain quantity of charge is called a (an)

Volt

A step-up transformer steps up the

Voltage

If you multiply amps times volts the answer will have the unit

Watt

Which of the following requires a measure of time ?

Watt

How does an object become electrostatically charged ?

When electrons are transferred

If you reverse the direction of an electric current in a wire the magnetic field around the wire will

become oriented with an opposite north direction.

A kilowatt-hour is a unit of

work