D.C Circuits and Current of Electricity

How do you calculate voltage?

• Current X Resistance
• Resistance ÷ Current
• Current ÷ Resistance
• Measure it with a ruler

What is current measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

Define electric current

• the total charge, Q flowing through the area per unit time, t.

• the total current, I flowing through the area per unit time, t.

• the rate of capacitance flow through a conductor.

• the rate of current flow through a conductor

1 ampere of current is defined as ......

• one coulomb of current passing through the surface area in one second.

• one coulomb of charge passing through the conductor in one second

• one coulomb of charge passing through the surface area in one second

• one coulomb of currrent passing through the conductor in one second.

Good conductors are _______ resistors

• bad
• good

What is resistance measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

What characteristics impact resistance of a material?

• Thickness 
• Temperature
• Length
• All of these

Which equation defines Ohm's Law?

• V=IV

• R=VI

• I=VR

• V=IR

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

• Increase
• Decrease
• Stay the same
• Not enough info

What is the current flowing through a 20 $\Omega$  resistor if the potential difference across it is 75 V? 

• 1500 A

• 95 A

• 0.27 A

• 3.75 A