ELECTRIC CIRCUITS

Which is the right form of Ohm's Law?

• V=I/R

• V=R/I

• I=V/R

• I=R/V

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

• 240 Ohms

• 60 Ohms

• $\frac{1}{240}$ Ohms

• 180 Ohms

If the Voltage is increased and the resistance stays the same, Current will

• Increase
• Decrease
• Stay the same
• X

Based on the graph, which of the following would be true regarding the relationship of voltage and current?

• As voltage increases, current decreases.

• Voltage will not affect current.

• As voltage decreases, current increases.

• As voltage increases, current also increases.

In a stereo amplifier circuit, there is a resistor across which you measure 25V, and your ammeter indicates 50mA of current through the resistor. What is the resistor’s value in kilohms? In ohms?

• 2kΩ, 20Ω

• 0.5kΩ, 500Ω

• 1.25kΩ, 1250Ω

• None of the above

What is Ohm's Law?

• a time to meditate...ohmmmm.

• a relationship between resistance, current, and voltage

• the relationship between current, voltage and charge

• the relationship between voltage, resistance, and charge

Does this diagram represent a series or parallel circuit?

• series circuit
• parallel circuit

What unit is used to measure voltage?

• Ohms

• Omega

• Volts

• Amps

What unit is used to measure resistance?

• Ohms

• Omega

• Volts

• Amps

This is the symbol for a _____?

• switch
• light 
• battery
• wires