These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following four responses
Assertion In the shown figure, tension T connected to the ceiling is `10 N lt T lt 20 N`

Reason System is not stationary.

Answer

B

Explanation

(b) Let `T_(0)` is the tension in the string connecting the two blocks. Then
`T_(0)-10=1xxa`
`therefore T_(0) gt 10N, 20-T_(0)=2xxa`
`therefore" " T_(0) lt20N`