EDC - Chapter 4 Capacitors and Inductors

Mica capacitor is most suitable for use in which of the following applications ?

• Bypass circuit.

• Coupling circuit.

• Filtering circuit.

• Transmitter circuit.

A capacitor has an IEC code of 473J. Determine the value of the capacitor.

• 0.0047 µF ± 5%

• 0.0047 µF ± 10%

• 0.047 µF ± 5%

• 0.047 µF ± 10%

Which one of the following is an application of laminated iron core inductor?

• Transformer.

• AM antenna.

• FM antenna.

• Microwave filter.

Which one of the following is an application of a ferrite core inductor?

• Transformer.

• AM antenna.

• Motor.

• Microwave filter

The operating frequency range of an air-cored inductor is

• Below 30 kHz.

• Above 3 MHz.

• 30 kHz to 300 kHz.

• 300 kHz to 3 MHz.

Identify the type of capacitor shown in Fig 1.

• Trimmer capacitor.

• Electrolytic capacitor.

• Fixed value capacitor.

• Variable-value capacitor.

Which one of the following factors could be increased so that capacitance of a capacitor can be decreased?

• Number of plates.

• Spacing between plates.

• Area of overlap of plates.

• Relative permittivity of dielectric material.

Two capacitors, 10 µF and 20 µF, are connected in parallel. Calculate the total equivalent capacitance.

• 0.15 µF.

• 6.7 µF.

• 15 µF.

• 30 µF.

Which one of the following materials is the dielectric of a capacitor?

• Steel.

• Paper.

• Copper.

• Glass.

A capacitor of value 10 µF has 30 V supply applied across it. Calculate the stored charge.

• 0.0003 C

• 0.003 C

• 0.03 C

• 0.3 C