CHAPTER 3: ELECTRIC CURRENT AND DC CIRCUITS

Resistance is measured in ____________

• Volts

• Amperes (Amps)

• Ohms

• Coulombs

What is the unit for current?

• Amps
• Voltage
• Ohms
• None of the above

What type of circuit is the most efficient?

• Combination circuit
• Series circuit
• Parallel circuit
• Isometric circuit

Tags

NGSS.MS-ETS1-2

Ohms

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Based on Ohm’s law, which of the following statements explains what must happen when the voltage across a resistor is decreased?

• The current through the resistor increases.

• The resistance of the resistor decreases.

• The resistance of the resistor increases.

• The current through the resistor decreases.

In a parallel circuit which of the following varies based on the amount of resistance

• Voltage
• Current
• Ohms Law
• Charge

Define electromotive force.

• It is the work done by the source in driving charges around a complete circuit.
• It is the work done by the source in driving a unit charge around a complete circuit.
• It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
• It is a measure of the flow of electric charge through a given cross-section of a conductor.

What does the voltmeter reading show?

• The eletromotive force of the electrical source
• The electromotive force of the bulb
• The potential difference across the bulb
• The potential difference across the electrical source

Define electric current. 

• It is the work done by the source in driving charges around a complete circuit.
• It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
• It is the work done by the source in driving a unit charge around a complete circuit.
• It is a measure of the flow of electric charge through a given cross-section of a conductor.

Electrons flow in a circuit from

• A high to a low electrical potential
• A low to a high electrical potential
• From a positive to a negative potential