AssertionIf velocity of charged particle in a uniform magnetic field at some instant is (a_(1)hat(i)-a_(2)hat(j))and at some other instant is (b_(1)hat(i)+b_(2)hat(j)), then a_(1)^(2)+a_(2)^(2)=b_(1)^(2)+b_(2)^(2) Reason Magnetic force cannot change velocity of a charged particle.

AssertionIf velocity of charged particle in a uniform magnetic field a

1.	AssertionIf velocity of charged particle in a uniform magnetic field at some instant is (a_(1)hat(i)-a_(2)hat(j))and at some other instant is (b_(1)hat(i)+b_(2)hat(j)), then a_(1)^(2)+a_(2)^(2)=b_(1)^(2)+b_(2)^(2) Reason Magnetic force cannot change velocity of a charged particle.
Answer» If both ASSERTION and Reason are true and Reason is the correct EXPLANATIONOF Assertion. If both Assertion and Reason are true but Reason is not correct explanation of Assertion. If Assertion is true but Reason is FALSE. If Assertion is false but Reason is true. Answer :c

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AssertionIf velocity of charged particle in a uniform magnetic field at some instant is (a_(1)hat(i)-a_(2)hat(j))and at some other instant is (b_(1)hat(i)+b_(2)hat(j)), then a_(1)^(2)+a_(2)^(2)=b_(1)^(2)+b_(2)^(2) Reason Magnetic force cannot change velocity of a charged particle.

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