Electricity Review

What is the current if 12 C of charge passes in 3s?

• 36 A

• 4 A

• 0.25 A

• 12 A

12 identical bulbs are connected in series. If their total resistance is 6, each bulb has a resistance of ________.

• 2 Ω

• 18 Ω

• 0.5 Ω

Two identical resistors are connected in series. The voltage across both of them is 12 V. What is the voltage across each one?

• 12 V

• 3 V

• 6 V

• 2 V

Two resistors are in parallel with a 6 V source. How do their voltages compare?

• Same

• Different

A resistor has 3 V across it. Its resistance is 1.5 ohms, what is the current?

• 2 A

• 4.5 A

• 2 V

• 4.5 V

As more lamps are put into a series circuit, the overall current in the circuit...

• stays the same

• increases

• decreases

An atom has...

• just as many electrons as protons

• no neutrons in the nucleus

• more protons than electrons

• as many electrons as protons and neutrons combined

A strip of fur is rubbed against a hard rubber rod. The rod thereby acquires a negative charge because

• frictional forces create electrons

• rubbing caused electrons to move from the fur to the rod

• friction caused protons to be removed from the rod

• electrons from the air molecules are transferred to the rod

If the distance between two spherical charged objects decreases by one half, then the electrical force between the objects will ____

• Increase by 2

• Decrease by 1/2

• Increase by 4

• Decrease by 1/4

Particle A has twice as much charge as particle B. Compared to the force on particle A, the force on particle B is...

• Half as much

• Two times as much

• Four times as much

• The same

• None of the above