Assertion-Reason
Direction (Q.Nos. 11-13) In each of the following
questions, a statement of Assertion is given by the corresponding
tatement of Reason. Of the statements, mark the correct answer
(a) If both Assertion and Reason are true and Reason is
the correct explanation of Assertion.
(b) If both Assertion and Reason are true, but Reason is
not the correct explanation of Assertion.
(c) If Assertion is true, but Reason is false.
(d) If Assertion is false, but Reason is true.
(e) If Assertion and Reason both are false.
11 Assertion Work done by a body is zero only, when
displacement produced by the force is zero.
Reason Work done by a force is negative, when
displacement occurs in the direction of applied force.
12 Assertion In a stretched bow, potential energy is
stored.
Reason Mechanical energy of a moving body
remains conserved.
13 Assertion Steam engine converts heat energy into
kinetic energy
Reason Steam engine works on the principle of
conservation of energy.
Answers
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Answer:
11 e
work can be 0 if force is perpendicular to displacement considered
negative work implies force component or whole force acts in opposite direction ti displacement
12 c
total energy is conserved not mech energy
13 a
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