Question

A device to store electrical charge is called:
A. Transformer
B. Capacitor
C. Resistor
D. Inductor

Answer 1

Hint: Electrical charge is a physical property of a matter which results in an experience of force when presented to an electromagnetic field. Given are four different electrical devices, carefully examine their working and uses to determine the correct option among them.

Formula used:
The capacity of storing the electric charge known as the capacitance of the capacitor and can be calculated as:
$Q=CV$

Complete step by step answer:
A capacitor may be a device for storing charge. It's usually made from two plates separated by a skinny insulating material referred to as the dielectric. One plate of the capacitor is charged, while the opposite has charge.
The charge stored during a capacitor is proportional to the electric potential between the 2 plates. For any capacitor having charge -Q on the negative plate and Q on the positive plate, the charge is proportional to the potential.
The following diagram represents a capacitor:

So, option B is correct.

Additional Information:

A capacitor may be a bit sort of a battery, but it's a special job to try to. A battery uses chemicals to store electricity and release it very slowly through a circuit; sometimes it can take several years. A capacitor generally releases its energy far more rapidly—often in seconds or less. If you are taking a flash photograph, for instance, you would like your camera to supply an enormous burst of sunshine during a fraction of a second. A capacitor attached to the flash gun charges up for a couple of seconds using energy from your camera's batteries. (It takes time to charge a capacitor and that is why you sometimes need to wait a while.) Once the capacitor is fully charged, it can release all that energy in a moment through the xenon flash bulb.

Note:
Capacitors are available in all shapes and sizes, but they typically have an equivalent basic component. There are the 2 conductors (plates) and there is the insulator in between them (called the dielectric). The 2 plates inside a capacitor are wired to 2 electrical connections on the surface called terminals, which are like thin metal legs you'll hook into an electrical circuit.