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Young's Modulus of Elasticity

is it correct...

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is it correct to take the clockwise work done in the graph postive or negative?What does NTA follow

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Q. Assertion: Work done by stretching or compressing a spring is positive.

Reason: Work done is said to be positive when force applied and displacement are in the same direction.

Q. In which of the following cases is the work done positive or zero or negative?
a) Work done by the porter on a suitcase in lifting it from the platform on to his head.
b) Work done by the force of gravity on suitcase as the suitcase falls from porter's head.
c) Work done by the porter standing on platform with suitcase on his head.
d) Work done by force of gravity on a ball thrown up vertically up into the sky.
e) Work done by force applied by hands of a man swimming in a pond.

Q. What is current do it really exists why does it flow opposite to the flow of electron and also why from positive terminal to negative terminal does current really flow or is all thing done by electron

6. Consider the following statements,

1] NOTA was introduced in India following the 2013 Supreme Court directive in the People’s Union for Civil Liberties v. Union of India judgment.

2] India became the 14th country to institute negative voting.

3] Significantly, NOTA in India does not provide for a ‘right to reject’.

Which of the above statements is/are correct?

Q. The work done in taking a unit positive charge from

P

A

W_{A}

P

B

W_{B}

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