Question

A: Resistance and variable resistance
B: Resistance and bulb
C: Bulb and galvanometer
D: Bulb and voltmeter

Answer 1

Hint:We are given two components that are widely used in electric circuits. We have to identify the elements based on the use that is given to them in each circuit. The basic parts of an electric or electronic circuit are denoted by some standardized symbols and these two elements are included among them.

Complete answer:
An electric circuit is nothing but a path in which we can find the flow of current. An electric circuit can either be a closed circuit or an open circuit depending upon the state of the switch that determines the flow of current.

The first symbol depicts a resistor. A resistor is a device that introduces a controlled amount of resistance in the circuit. It is a passive electronic component that is widely used in almost all the electric circuits. Resistors reduce or control the flow of current in an electric circuit. It is measured in terms of Ohms.

The second symbol denotes a bulb, which is a device that glows when an electric current passes through it. The bulb uses the electric energy that is provided by the battery. It converts the electrical energy into light energy. It does not use the current. The bulb helps the user to verify whether the circuit is working or not.

Thus, option B is the correct answer among the given options.

Note: In an electric circuit, the resistors can be connected either in parallel or in series. This causes a difference in the values of the total resistance which in turn changes the value of the current. In this way, the intensity of the light from the bulb can be varied.