CBSE Class 10 Answered
Two compass needles are placed near a current carrying wire at points P and Q as shown(see figure). Then:
a)their needles will not deflect
b)needle at P only will deflect
c)both the needles will deflect in same direction.
d)the needles will deflect in opposite directions....Please give reason.
Asked by sumandeesinghrana | 12 Oct, 2010, 09:01: PM
Expert Answer
Magnetic field due to wire is circular with wire passing throufh the center of circle.
In above fig field line will be coming out of page at point P and going into the page at point Q
So needle at P will point toward you (i.e. out of page) and at Q it will point into the page.Therefore d) is the correct option.
Answered by | 12 Oct, 2010, 11:44: PM
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