Questions
Statement 1: Magnetic field due to an infinite straight conductor varies inversely as the distance from it.
Statement 2: The magnetic field at the centre of the circular coil is zero.
detailed solution
Correct option is B
The magnetic field at a point due to current flowing through an infinitely long conductor is given byB=μ04π 2lawhere, A is the distance of that point from conductor. Now according to right hand thumb rule, it follows that magnetic field is in the form of concentric circles, whose centres lie on the straight conductor . The magnetic field at the centre of the circular coil is μ0i2rTalk to our academic expert!
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Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is
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