Physics
Assertion (A) : Smaller the least count of an instrument, more precise the measurement made by using it.
Reason (R) : Least count of an instrument is the smallest measurement that can be taken accurately with it.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Measurements
1 Like
Answer
both A and R are true and R is the correct explanation of A
Explanation
Assertion (A) is true because an instrument with a smaller least count can measure finer divisions, which means the measurements are more precise.
Reason (R) is true because by definition, least count is the smallest value that an instrument can measure accurately.
The reason correctly explains the assertion because a smaller least count means the instrument can measure smaller changes, resulting in greater precision.
Answered By
1 Like
Related Questions
Identify the incorrect statement(s) from the following :
(I) The time period of oscillations depends on the extent of swing on either side.
(II) The time period of oscillations is directly proportional to the square root of acceleration due to gravity.
(III) The time period of oscillations is inversely proportional to the square root of its effective length.
(IV) The time period of oscillations does not depend on the mass or material of the suspended body.
- (II) and (III)
- Only (II)
- Only (IV)
- (I), (II) and (III)
Assertion (A) : The unit used to measure speed is an example of a derived unit.
Reason (R) : Derived units can neither be changed nor can be related to any other fundamental unit.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : The least count of a screw gauge can be decreased by increasing the pitch and decreasing the total number of divisions on circular scale.
Reason (R) : Least count of screw gauge is directly proportional to pitch of the screw gauge.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : A pendulum clock goes slow (i.e., the time period of oscillation increases) when it is taken to mines.
Reason (R) : This is due to increase in the value of acceleration due to gravity g.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false