Physics
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
Related Questions
The length of a seconds' pendulum is nearly —
- 0.5 m
- 9.8 m
- 1.0 m
- 2.0 m
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) : 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
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