Lesson 70: Electricity Quiz

If a 12V battery is powering an electrical circuit, how much current is flowing through the circuit if the resistance of the wire and light bulb is a total of 3 ohms?

You must include units in your answer.

How much voltage would be needed to push 2 amps of current through a circuit with a resistance of 3 ohms. You must include units in your answer.

Some pith balls are shown hanging next to each other. Which statement is most likely to be true...

• Both are neutrally charged.

• The left is positive and the right is negative.

• The left is positive and the right is positive.

• The left is negative and the right is negative.

Two pith balls are hanging as shown. The charge of the unlabeled pith ball on the right is most likely?

• positive

• negative

• neutral and not polarized

• neutral, but polarized

Two pith balls are hanging. The ball on the left is positively charged, so the ball on the right is most likely...

• negatively charged

• positively charged

• quantum flux charged

• about to explode!

When a negatively charged object is placed near an electroscope, the electrons are pushed away towards the foil leaves, making them spread open. Placing a positively charged object near the electroscope would...

• push the protons, causing them to go to the foil leaves

• pull the electrons from the foil leaves, making them positively charged

• have no effect on the electroscope

• push the electrons, causing them to go to the foil leaves

Which of the following 3 objects is negatively charged?

• 
• 
• 

When a balloon rubs against hair, the balloon becomes negatively charged and the person's hair becomes

• negatively charged

• positively charged

• neutrally charged

Before a lightning strike, the thunderclouds are an example of _______________ electricity. During a lightning strike, the lightning bolt is an example of _____________ electricity.

• static, current

• current, static

• positive, negative

• negative, positive

Two positive and two negative fixed charges (all with the same magnitude of charge) are placed around the black positively charged puck. The puck is free to move. Which direction will the puck go based on the forces exerted by the surrounding charges?

• up

• down

• left

• right