Question

What is true about a capacitor?

• A. The working voltage of a capacitor is the minimum continuous voltage that can be applied to a capacitor before the capacitor fails.
• B. The tolerance of capacitors is expressed in decimals.
• C. The working temperature for the capacitor lies between $-30°C$ to $+125°C$.
• D. Temperature coefficient of a capacitor is determined by calculating the minimum change in the capacitance for a specific temperature range.

Answer 1

The correct option is D

Temperature coefficient of a capacitor is determined by calculating the minimum change in the capacitance for a specific temperature range.

Explanation for Correct Answer:

In the case of option D,

1. A capacitor is a passive device with two terminals, capable of storing electrical energy in an electric field.
2. The temperature coefficient of a capacitor gives the minimum change in capacitance of a capacitor, over a specified temperature range.
3. It states that when the temperature exceeds a certain point, the change in capacitance of a capacitor that might occur is understood as the temperature coefficient of capacitors.
4. So temperature coefficient of a capacitor is determined by calculating the minimum change in the capacitance for a specific temperature range.

Explanation of Incorrect Answer:

In the case of option A,

1. Capacitors have the maximum amount of voltage that when obtained won’t cause damage to their dielectric material.
2. Hence, option A is incorrect.

In the case of option B,

1. The tolerance rating of a capacitor is expressed with a plus-or-minus value.
2. Hence, option B is incorrect.

In the case of option C,

1. The working temperature for the capacitor lies between $-55°C$ and $125°C$.
2. Hence, option C is incorrect.

Hence option D is the correct answer.