The correct answer is: A. Ability to amplify Dc and low frequency signals.
A DC amplifier is a type of amplifier that can amplify both DC and low frequency signals. This is in contrast to an AC amplifier, which can only amplify AC signals. DC amplifiers are often used in applications where it is important to maintain a constant output voltage, such as in power supplies and voltage regulators.
DC amplifiers are typically made up of a number of different components, including transistors, resistors, and capacitors. The transistors are used to amplify the input signal, while the resistors and capacitors are used to provide stability and control the gain of the amplifier.
The main advantage of a DC amplifier is that it can amplify both DC and low frequency signals. This makes it ideal for use in a variety of applications. However, DC amplifiers also have some disadvantages. One disadvantage is that they can be more expensive than AC amplifiers. Another disadvantage is that they can be more difficult to design and build.
Overall, DC amplifiers are a type of amplifier that can be used to amplify both DC and low frequency signals. They are often used in applications where it is important to maintain a constant output voltage. However, they can be more expensive and difficult to design and build than AC amplifiers.
Here is a brief explanation of each option:
- Option A: Ability to amplify Dc and low frequency signals. This is the correct answer, as it is the main advantage of a DC amplifier.
- Option B: Temperature stability. DC amplifiers are typically not as temperature stable as AC amplifiers. This is because the DC output voltage of a DC amplifier can be affected by changes in temperature.
- Option C: Utmost economy. DC amplifiers are not necessarily the most economical type of amplifier. They can be more expensive than AC amplifiers, especially if they are designed to be highly accurate.
- Option D: Avoidance of frequency sensitive components. DC amplifiers do not require frequency sensitive components, such as capacitors. However, this is not necessarily an advantage, as capacitors can be used to improve the performance of an amplifier.