Physics-
General
Easy
Question
From a cylinder of radius R, a cylinder of radius R/2 is removed, as shown. Current flowing in the remaining cylinder is I. Magnetic field strength is–
- zero at point A
- zero at point B
The correct answer is:
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Find the magnitude and direction of a force vector acting on a unit length of a thin wire, carrying a current 
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In the following compounds the order of basicity is
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I)
II)
III)
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A particle of charge 
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A conducting wire bent in the form of a parabola 
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In a region of space, a uniform magnetic field B exists in the y–direction. A proton is fired from the origin, with its initial velocity v making a small angle a with the y–direction in the yz plane. In the subsequent motion of the proton
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In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is
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physics-General
