Assertion : In a uniform electric field electrons move in the opposite direction of electric field.
Reason : This is because of the negative charge of an electron.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

**Step 1: Understand the Assertion**
The assertion states that in a uniform electric field, electrons move in the opposite direction of the electric field.

- In an electric field, the direction of the field is defined as the direction in which a positive charge would move. Since electrons are negatively charged, they will move in the opposite direction.

**Step 2: Understand the Reason**
The reason given is that this behavior is due to the negative charge of the electron.

- The charge of an electron is indeed negative, approximately -1.6 x 10^-19 coulombs. This negative charge causes the electron to experience a force in the opposite direction of the electric field, according to the formula F = qE, where F is the force, q is the charge, and E is the electric field strength.

**Step 3: Conclusion**
Both the assertion and the reason are true. The reason provided correctly explains why the assertion is true. Therefore, we can conclude that both the assertion and reason are true, and the reason is the correct explanation for the assertion.

**Final Answer:**
Both assertion and reason are true, and the reason is the correct explanation for the assertion.

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