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Physics - Magnetic Effect of Current Questions and Answer >>

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1. An electron is travelling horizontally towards east. A magnetic field in vertically downward direction exerts a force on the electron along. [EAMCET 1984]


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2. A circular coil ‘A’ has a radius R and the current flowing through it is I. Another circular coil ‘B’ has a radius 2R and if 2I is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e. BA to BB ) . [CBSE PMT1993; A]


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3. A length L of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is . [NCERT 1980; AII]


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4. A charged particle moves in a uniform magnetic field. The velocity of the particle at some instant makes an acute angle with the magnetic field. The path of the particle will be . [MP PMT 1999]


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5. A current carrying rectangular coil is placed in a uniform magnetic field. In which orientation, the coil will not tend to rotate. [MP PMT 1995]


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