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Ans: According to Faraday’s law when the magnetic flux linking a circuit changes, an electromotive force is induced in the circuit proportional to the rate of change of the flux linkage. So, when  rectangular coil is rotated in a uniform magnetic field about an axis passing through its centre and perpendicular to the direction of…

As a child, you must all have played with a magnet. It is a material that attracts iron or ferrous objects. Chromium and Nickel are the other two objects that are attracted to magnets. Later when the characteristics of a magnet were discovered it was found that in the magnet there exist two poles at…

Solution: B = 2.5 T, r = 2 cm = 2 × 10–2 m, θ = 0, ΦB=?ΦB=BAcosθ=2.5×π(2×10−2)2×cos0=3.14×10−3WbΦ�=?Φ�=������=2.5×�(2×10−2)2×���0=3.14×10−3�� Solution: B = 1 T, A = 10–2 m2, θ=60∘,n=100,ΦB=?ΦB=nBAcosθ=100×1×10(−2)×cos60∘=0.5Wb�=60∘,�=100,Φ�=?Φ�=�������=100×1×10(−2)×���60∘=0.5�� Options: (a) maximum and minimum once each (b) maximum and minimum twice each (c) maximum once, minimum twice (d) maximum twice, minimum once Answer: (b)

It’s the component of the flux that passes through the coil that’s shared by all. Magnetic flux is represented by the symbol B, where B could be a field and therefore the unit is Weber (Wb). The magnetic flux value could be a vector quantity that depends on the flux direction. Magnetic flux refers to…