Quiz 2 - Current, Potential Difference & Ohm's law

Why is a battery important in an electrical circuit?

• As a source of energy.

• As a path for electricity to flow through.

• As a connector to connect all parts of a circuit.

Batteries and power plants are examples of ______________.

• energy sources

• energy conduction

• energy transformation

An object through which electrons can easily flow is called ___________.

• Conductor

• Insulator

What is the difference between a conductor and an insulator?

• An insulator allows electricity to flow through it easily and a conductor does not
• A conductor allows electricity to flow through it easily and an insulator does not.
• An insulator is magnetic and a conductor is not
• A conductor is magnetic and an insulator is not

Why metal or conductor is a good electrical conductivity?

• Because the material has a large number of electrons that able to move freely

• Because the material has a high electrical resistivity

• Because the electrons in the material are not free to roam around and be shared by neighboring atoms

• Because the current can flow at low temperatures

The rate of flow of electrical charges is known as _________.

• Current

• Resistance

• Voltage

• Conductor

Which of the following equations is the correct one to describe current?

• $I=\frac{P}{t}$

• $I=\frac{Q}{e}$

• $I=\frac{F}{q}$

• $I=\frac{Q}{t}$

One ampere equals about 1 _____ of electrons

• voltage
• watt
• ohm
• coulomb

30 C of charge flows through a wire in 1.2 seconds. What is the current?

• 1.5 A

• 15 A

• 2.5 A

• 25 A

An electric charge of 900 C flows through a metallic conductor in 10 minutes. Calculate the current.

• 1.5 A

• 15 A

• 9.0 A

• 90 A