Electromagnetic Theory Short Questions and Answers

Questions

41 A Mica Capacitor And A Ceramic Capacitor Both Have The Same Physical Dimensions. Which Will Have More Value Of Capacitance ?

A Mica Capacitor

B Ceramic Capacitor

C Both Will Have Identical Value Of Capacitance

D It Depends On Applied Voltage

View Answer

Answer: Ceramic Capacitor

42 Which Of The Following Capacitors Can Be Used For Temperature Compensation ?

A Ceramic Capacitor

B Air Capacitor

C Paper Capacitor

D None Of The Above

View Answer

Answer: Ceramic Capacitor

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43 A Single Core Cable Used On 33000 V Has Conductor Diameter 10 Mm And The In¬Ternal Diameter Of Sheath 25 Mm. The Maximum Electrostatic Stress In The Cable Is

A 72 X 105 V/M

B 92 X 105 V/M

C 62 X 105 V/M

D None Of The Above

View Answer

Answer: 72 X 105 V/M

44 The Number Of Faraday Tubes Of Flux Passing Through A Surface In An Electric Field Is Called

A Electric Flux

B Magnetic Flux Density

C Electric Flux Density

D Electric Charge Density

View Answer

Answer: Electric Flux

45 The Value Of E Within The Field Due To A Point Charge Can Be Found With The Help Of

A Coulomb's Laws

B Kirchhoff S Laws

C Faraday's Laws

D None Of The Above

View Answer

Answer: Coulomb's Laws

46 At A Point Is Equal To The Negative Potential Gradient At That Point.

A Magnetic Flux

B Electric Flux

C Electric Intensity

D None of these

View Answer

Answer: Electric Intensity

47 Is That Property Of A Capacitor Which Delays Any Change Of Voltage Across It.

A Capacitance

B Inductance

C Potential Gradient

D None Of The Above

View Answer

Answer: Capacitance

48 What Will Happen To An Insulating Medium If Voltage More Than The Breakdown Voltage Is Applied On It ?

A It Will Get Punctured Or Cracked

B It Will Melt

C It Will Become Magnetic

D Its Molecular Structure Will Get Changed

View Answer

Answer: It Will Get Punctured Or Cracked

49 Out Of The Following Capacitors Of Identical Rating Which One Will Have The Smallest Dimensions ?

A Ceramic Capacitor

B Mica Capacitor

C Aluminium Foil Capacitor

D Paper Capacitor

View Answer

Answer: Ceramic Capacitor

50 Paper Condenser Is

A Usually Of Fixed Value

B Always Polarised

C Electrolytic Condenser

D A Variable Condenser

View Answer

Answer: Usually Of Fixed Value

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