Physics-(general)
NEET Physics (general) Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): In a vacuum tube, the controlled flow of electrons is obtained by varying the voltage between its electrodes. | Reason (R): Air molecules in the inter-electrode space would cause electrons to lose energy through collisions.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
The assertion and reason both describe how vacuum tubes work, where the absence of air prevents energy loss due to electron collisions.
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