Electrostatic

31. at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.

1. Electric intensity
2. Magnetic flux density
3. Electric flux
4. None of the above

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32. Capacitance increases with

1. increase in plate area and decrease in distance between the plates
2. increase in plate area and distance between the plates
3. decrease in plate area and value of applied voltage
4. reduction in plate area and distance between the plates

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33. capacitors are mainly used for radio frequency tuning.

1. Paper
2. Air
3. Mica
4. Electrolytic

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34. capacitors are used for audio frequency and radio frequency coupling and tuning.

1. Air
2. Mica
3. Plastic film
4. Ceramic

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35. capacitors are used in transistor circuits.

1. Ceramic
2. Paper
3. Air
4. Electrolytic

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36. capacitors can be used only for D.C.

1. Air
2. Paper
3. Mica
4. Electrolytic

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37. Dielectric constant for mica is nearly

1. 200
2. 100
3. 3 to 8
4. 1 to 2

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38. Dielectric strength _________ with increasing thickness

1. increases
2. decreases
3. remains unaltered
4. none of the above

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39. Dielectric strength of a material depends on

1. moisture content
2. temperature
3. thickness
4. all of the above

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40. Dielectric strength of a medium is usually expressed in

1. J/mm
2. C/m2
3. kV/mm
4. N/mm

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