14. Assertion: Positive charge inside the cell always goes from positive terminal to the
negative terminal.
Reason: Positive charge inside the cell may go from negative terminal to the positive
terminal.
a. Assertion is INCORRECT but, reason is CORRECT.
b. Assertion is CORRECT but, reason is INCORRECT.
C. Both assertion and reason are CORRECT but, reason is NOT THE CORRECT
explanation of the assertion.
d. Both assertion and reason are CORRECT and reason is the CORRECT explanation of
the assertion.
Answers
Answer:
D
Step-by-step explanation:
Before I answer this question, let us introspect this question.
The question should have been, “Why does positive charge move towards the negatively charged region”.
Some fundamental truths:
An electric current is a flow of electric charge.
In electric circuits this charge is often carried by moving electrons in a wire.
Electrons are negatively charged particles.
Combining the above three facts, it is evident that electrons move from “negative” terminal towards the positive terminal.
What is positive and negative:
Positive and negative are just our conventions, as much as up and down, north and south, left and right. And it was just an arbitrary decision to call the lack of electrons as positive and presence of excess electrons as negative.
Thus, our definition of current is that equivalent effect of moving a positive charge from a higher potential(positive) to lower potential(negative). The direction of current therefore is represented from the positive terminal towards the negative terminal. In reality, only electrons move from negative terminal to the positive terminal. The direction of the current is exactly opposite to the direction of flow of electrons.
How surprising, we call flow of electrons as current, but our conventional notion of current is exactly opposite of what happens in reality, all this because we wanted to call the charge on the electron as negative.