Question

In alternating current
A The direction of current is always positive
B The direction of current is always negative
C The direction of current changes constantly
D The direction of current is either positive or negative.

Answer 1

This question is based on one of the types of current that is alternating current. First we have to know the term current. The current generated in any electric circuit is due to the flow of electrons. These electrons flow within electric wires to all the devices connected by these electric wires and these electrons are produced from any power generating device.

Complete step by step answer:
We know that the motion of charge carriers is responsible for generating the current. The movement of current is from positive to negative terminal. The current flows in the conductor to provide the desired effect.

Now we have to classify the types of current that are, Direct and Alternating current.
The direct current occurs when there is a steady flow of current in the circuit. In this direct current the electric charge flows only in one direction.
One of the sources of direct current is battery. The battery has two terminals, positive and negative. The electrons in the wire will begin to flow to produce current. The battery is used all over the world to provide the direct current to the engine for starting the lighting and ignition system.

Now, another example of current is Alternating current. This kind of current occurs when there is a continuous change of the current flow in the circuit. In this Alternating current the electric charge flows only in periodic motion.
Therefore, in alternating current the direction of current changes constantly.

Thus, the correct option is (C).

Note:
In this question, students must have knowledge of the term current and the types of current. The alternating current is mostly used for domestic purposes. Alternating current is used to transmit power over a wide range.