Capacitor

capacitor stores energy in a form of...

• magnetic field

• reactance field

• electrical field

• all of the above

Choose the correct statement that describing a capacitor.

• it is a three terminal electrical device

• the unit of capacitance is ohm

• the capacitance value of fixed capacitor can be adjusted

• Sometimes it is used as a backup battery

If 40 V are applied across a 100 µF capacitor, find the charge on the plates.

• 0.004 C

• 0.004 µC

• 4 C

• 4 µC

Which of the following devices uses a capacitor?

• rectifier circuit

• radio

• power bank

• all of the above

What is the parameter that describe the ability of capacitor stores charge?

• reactance

• resistance

• inductance

• capacitance