Capacitance, Current, Resistivity, and Resistance

Which type of energy do capacitors stored?

• heat energy

• kinetic energy

• potential energy

• vibrational energy

What is the value of capacitance of a capacitor which has a voltage of 4V and has 16mC of charge?

• 4 F

• 4 mF

• 64 F

• 64 mF

Which can increase the capacitance of a parallel-plate capacitor?

• increasing the charge

• decreasing the charge

• increasing the plate separation

• decreasing the plate separation

Which relationship of the variables is true in capacitors?

• C = QV

• V = CQ

• V = Q/C

• Q = C/V

If 4μF and 2μF capacitors are connected in series, the equivalent capacitor is ___________.

• 0.75 μF

• 1.33 μF

• 2 μF

• 6 μF

If 4μF and 2μF capacitors are connected in parallel, the equivalent capacitor is ___________.

• 0.75 μF

• 1.33 μF

• 2 μF

• 6 μF

What is the current in the lamp if it has a charge of 60 C in 2 minutes?

• 0.5 A

• 1 A

• 5 A

• 30 A

What is the unit used to measure electric current?

• Volt

• Ampere

• Ohm

• Watt

All of the following wires are made of the same material but are different sizes. Identify the wire with the lowest resistance.

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The electric current as a function of voltage of a wire is presented by the graph. What is the resistance of the wire?

• 0.4 Ω

• 0.6 Ω

• 1 Ω

• 1.6 Ω