367607
An example to define length in the form of time at a place is
1 Wrist watch
2 Linear expansion of iron rod
3 Frequency of ripples on the surface of water
4 Seconds pendulum
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367608
Assertion : A.U. is much smaller than \( \mathop A^{~~\circ} \). Reason : A.U. stands for astronomical unit and \( \mathop A^{~~\circ} \) stands for angstrom.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
A.U. is used (Astronomical unit) to measure the average distance of the centre of the sun from the centre of the earth, while angstrom is used for very short distance. So correct option is (4)
PHXI02:UNITS AND MEASUREMENTS
367609
The one which is not the unit of length is
1 Angstrom unit
2 Micron
3 Parsec
4 Steradian
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367610
Statement A : Parallax, method is used for measuring distances of stars. Statement B : With increase in the distance of a star from earth, the parallactic angle becomes too small to be measured accurately.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Parallax method is used for measuring distances of nearby stars only. If \(D\) is a distance of a far away star from Earth, then \(\theta = \frac{b}{D}\) where, \(\theta \) is called parallactic angle and \(b\) is the distance between the two different positions on Earth from where the star is being observed. \(\therefore \) With increase in the distance of star, parallactic angle becomes too small to be measured accurately. Therefore, Statement \(A\) and Statement \(B\) are correct.
367607
An example to define length in the form of time at a place is
1 Wrist watch
2 Linear expansion of iron rod
3 Frequency of ripples on the surface of water
4 Seconds pendulum
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367608
Assertion : A.U. is much smaller than \( \mathop A^{~~\circ} \). Reason : A.U. stands for astronomical unit and \( \mathop A^{~~\circ} \) stands for angstrom.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
A.U. is used (Astronomical unit) to measure the average distance of the centre of the sun from the centre of the earth, while angstrom is used for very short distance. So correct option is (4)
PHXI02:UNITS AND MEASUREMENTS
367609
The one which is not the unit of length is
1 Angstrom unit
2 Micron
3 Parsec
4 Steradian
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367610
Statement A : Parallax, method is used for measuring distances of stars. Statement B : With increase in the distance of a star from earth, the parallactic angle becomes too small to be measured accurately.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Parallax method is used for measuring distances of nearby stars only. If \(D\) is a distance of a far away star from Earth, then \(\theta = \frac{b}{D}\) where, \(\theta \) is called parallactic angle and \(b\) is the distance between the two different positions on Earth from where the star is being observed. \(\therefore \) With increase in the distance of star, parallactic angle becomes too small to be measured accurately. Therefore, Statement \(A\) and Statement \(B\) are correct.
367607
An example to define length in the form of time at a place is
1 Wrist watch
2 Linear expansion of iron rod
3 Frequency of ripples on the surface of water
4 Seconds pendulum
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367608
Assertion : A.U. is much smaller than \( \mathop A^{~~\circ} \). Reason : A.U. stands for astronomical unit and \( \mathop A^{~~\circ} \) stands for angstrom.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
A.U. is used (Astronomical unit) to measure the average distance of the centre of the sun from the centre of the earth, while angstrom is used for very short distance. So correct option is (4)
PHXI02:UNITS AND MEASUREMENTS
367609
The one which is not the unit of length is
1 Angstrom unit
2 Micron
3 Parsec
4 Steradian
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367610
Statement A : Parallax, method is used for measuring distances of stars. Statement B : With increase in the distance of a star from earth, the parallactic angle becomes too small to be measured accurately.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Parallax method is used for measuring distances of nearby stars only. If \(D\) is a distance of a far away star from Earth, then \(\theta = \frac{b}{D}\) where, \(\theta \) is called parallactic angle and \(b\) is the distance between the two different positions on Earth from where the star is being observed. \(\therefore \) With increase in the distance of star, parallactic angle becomes too small to be measured accurately. Therefore, Statement \(A\) and Statement \(B\) are correct.
367607
An example to define length in the form of time at a place is
1 Wrist watch
2 Linear expansion of iron rod
3 Frequency of ripples on the surface of water
4 Seconds pendulum
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367608
Assertion : A.U. is much smaller than \( \mathop A^{~~\circ} \). Reason : A.U. stands for astronomical unit and \( \mathop A^{~~\circ} \) stands for angstrom.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
A.U. is used (Astronomical unit) to measure the average distance of the centre of the sun from the centre of the earth, while angstrom is used for very short distance. So correct option is (4)
PHXI02:UNITS AND MEASUREMENTS
367609
The one which is not the unit of length is
1 Angstrom unit
2 Micron
3 Parsec
4 Steradian
Explanation:
Conceptual Question
PHXI02:UNITS AND MEASUREMENTS
367610
Statement A : Parallax, method is used for measuring distances of stars. Statement B : With increase in the distance of a star from earth, the parallactic angle becomes too small to be measured accurately.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Parallax method is used for measuring distances of nearby stars only. If \(D\) is a distance of a far away star from Earth, then \(\theta = \frac{b}{D}\) where, \(\theta \) is called parallactic angle and \(b\) is the distance between the two different positions on Earth from where the star is being observed. \(\therefore \) With increase in the distance of star, parallactic angle becomes too small to be measured accurately. Therefore, Statement \(A\) and Statement \(B\) are correct.
