Question

is the symbol of:
 

A. Plug key
B. Load
C. Heater
D. Bulb

Answer 1

Hint: In this question we will discuss all the given electrical equipment one by one, this will directly give us the required result. Also, we will study about the basics of a simple electric circuit. We will also see the basics of series and parallel series, for our better understanding.

Complete step-by-step answer:
As we know, there are many electrical symbols which represent different electrical equipment.
We have the symbol for the above given equipments are:
a)

As we know that a plug key is an electrical component which acts like a switch. It is a small metallic key which is inserted in a metallic base to switch on the circuit and when this metallic key is taken off from its metallic base then the circuit gets switched off.
b)

As we know that electric load is the device which takes electrical energy. We can also say that, the electrical load is a device that consumes electricity in the form of current and transform this current to heat energy, light energy.
c)

Now, here we know that an electric heater is termed as an electrical device that converts an electric current into heat energy. Also, the heating element inside every electric heater is called as an electrical resistor. Electrical resistor works on the principle of Joule heating. According to this principle an electric current passing through a resistor will convert the electrical energy into heat energy.
d)

As we know from the basics that a glass bulb contains a wire filament inside a vacuum or inert gas. The bulb is designed to provide light when electricity is passed through the filament to make it incandescent.
Therefore, from the above explanation, we know that the given figure represents a load.

So, the correct answer is “Option B”.

Additional Information: We should know that in a series circuit, the output current of the first resistor flows into the input of the second resistor; so, the current is the same in each resistor whereas In a parallel circuit, all of the resistor are on connected together on one side and all the leads on the other side are connected together.
In a circuit if the resistance is constant over a range of voltage, then I = V/R, can be used to predict the behavior of the material. This involves DC current and voltage, it is the same for the resistors. Further, a material obeys Ohm's law or does not obey; the resistance of the material can be described in terms of its bulk. The resistivity, and the resistance both, is temperature dependent. Over certain ranges of temperature, this temperature dependence can be predicted from resistance.

Note: There are many electrical equipment and each have different symbols. Internal resistance of a circuit refers to the opposition to the flow of current offered by the cells and batteries themselves thereby, resulting in the generation of heat. Internal resistance and resistance both are measured in Ohms.