Electrical Engineering All Engineering Career
Question 111
The minimum value of potential gradient in a cable occurs in ?
The minimum value of potential gradient in a cable typically occurs in the insulation. This is because the insulation is designed to withstand high electric fields without breaking down. By maintaining a low potential gradient (electric field strength) in the insulation, the risk of electrical breakdown is minimized, ensuring the cable's reliability and safety.
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Question 112
Dielectric strength ____ with increasing thickness ?
Dielectric strength typically decreases with increasing thickness of the dielectric material.
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Question 113
Which of the following capacitors is marked for polarity ?
The capacitor marked for polarity is the Electrolytic capacitor. Electrolytic capacitors are polarized components, meaning they have a positive and a negative terminal, unlike non-polarized capacitors such as those made of air, paper, or mica. Connecting an electrolytic capacitor in reverse polarity can cause damage or even failure due to electrolyte breakdown and potentially explosive release of the electrolyte.
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Question 114
The surface integral of normal component of the electric intensity E over a closed surface is equal to times the total charge inside it". The above statement is known as ?
The statement "The surface integral of the normal component of the electric intensity E over a closed surface is equal to times the total charge inside it" is known as Gauss's theorem or Gauss's law. It is one of the fundamental laws of electromagnetism, named after the German mathematician and physicist Carl Friedrich Gauss
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Question 115
Which of the following capacitors can be used for temperature compensation ?
Capacitors used for temperature compensation typically utilize materials with specific properties to counteract the effects of temperature variations. Among the options provided, ceramic capacitors are commonly used for temperature compensation purposes. They can be designed to have a stable capacitance over a wide temperature range, making them suitable for applications where temperature fluctuations need to be minimized. Therefore, the correct answer is:
Ceramic capacitor
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Question 116
_____ field is associated with the capacitor ?
Electric
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Question 117
Which medium has the least dielectric strength ?
The medium with the least dielectric strength is: Air
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Question 118
A capacitor consists of two ?
A capacitor consists of two conductors separated by an insulator.
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Question 119
When the dielectric is homogeneous, the potential gradient is ?
When the dielectric is homogeneous, the potential gradient is uniform.
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Question 120
When a dielectric is placed in an electric field the field strength ?
When a dielectric is placed in an electric field, the field strength decreases.
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