1.

Assertion (A) : A straight wire carries current in thevertically upwards .Magnetic fieldlines aroundit areconcentric circles in horizontal planein an anticlockwisedirection. Reason (R) : Direction of magneticfieldis given by righthandthumb rule .

Answer»

Both (A) and (R) are true and (R) is CORRECT EXPLANATION of the assertion
Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
(A) is true but (R) is FALSE.
(A) is false but (R) is true.

Answer :A


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