Charge, Current, and Circuits

Which one of these statements is true of a negatively charged object?

• There are more electrons than protons in a negatively charged object.

• Protons are the only charged particles present in a negatively charged object.

• Electrons are the only charged particles present in a negatively charged object.

• The electrons and protons in a negatively charged object have a negative charge.

Tags

NGSS.MS-PS1-1

A negatively charged balloon is brought near to a metal soda can. Which diagram shows the correct arrangement of charge on the can as the balloon is held near it?

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Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The rate at which charge flows through a circuit is referred to as the

• current

• resistance

• electric circuit

• electric potential difference

Three Circuits are shown below with varying numbers of light bulbs in series. The batteries and light bulbs are identical in every way. Which has the greatest current?

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The batteries and bulbs of the two circuits shown on the right are identical. In which circuit will there be the greatest resistance?

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Tags

NGSS.HS-PS3-5

Consider the diagram of a 2-cell, 3-bulb circuit at the left. Several positions on the circuit are labeled with a letter. At which two points are the voltages the same?

• A and H

• B and D

• E and F

• F and G

Tags

NGSS.HS-PS2-5

A 2-cell, 2-bulb circuit is shown in the diagram at the right. The two light bulbs are identical. Several points are labeled around the circuit. How do the currents at point B and point D compare?

• The current is greatest at point B.

• The current is greatest at point D.

• The current is the same at points B and D.

• The current cannot be compared.

Tags

NGSS.HS-PS2-5

The circuit diagram represents four resistors connected to a 12-volt source. What is the total current in the circuit?

• 0.5 A

• 2.0 A

• 8.6 A

• 24 A

Which circuit on the left has the smallest equivalent (total) resistance?

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In a simple electric circuit, a 24-ohm resistor is connected across a 6.0-volt battery. What is the current in the circuit?

• 1.0 A

• 140 A

• 0.25 A

• 4.0 A