Question

The schematic symbol for the tuning capacitor is?
A.
B.
C.
D.

Answer 1

There are basic three kinds of passive components that can be added to a source. Resistor, inductor, and capacitor. Resistance is a linear component whereas an inductor and capacitor stores energy in the form of the magnetic and electric field. Nowadays according to the requirements, different types of these passive components are available in the market.

Complete step by step solution:
A tuning capacitor is the most commonly used type of variable capacitor.
In variable capacitors, one metallic plate of the capacitor is fixed and another plate is variable (movable). With the help of these. These capacitors have a variable energy storage capacity that can be measured with the help of the capacitance values. In general, the variable capacitors provide a capacitance range between $10pF-500pF$. All variable capacitors are denoted by the symbol,

A tuning capacitor is formed of a stator, a rotor, a frame that supports the stator, and a mica capacitor.
The stator is a stationary part whereas the rotor rotates with the help of a movable shaft. When the rotor and stator plates come in contact they tend to form a plate. The tuning capacitor has maximum capacitance value when the rotor and stator slots completely fit into each other.
These are used in LC circuits in radio receivers.

Thus, from the above discussion, we can say that the option which shows the correct symbol for the tuning capacitor is Option D.

Note:
The capacitors are broadly classified as fixed and variable capacitors. The capacitors which have affixed value are known as fixed capacitors. The capacitors which facilitate by which we can change the value to the capacitance are known as variable capacitors.