» CBSE Physics Magnetic Effects of Current Expected Questions for Quick Revision : Unit IV : CBSE Sample Question Papers

CBSE Physics Magnetic Effects of Current Expected Questions for Quick Revision : Unit IV Filed under: Class XII Physics Expected Question [Long Answer Questions-5 Marks Each] 1. State Biot-Sovart’s law. Using this obtain an expression for the magnetic field at the centre of a current carrying circular loop. Answer 2. A moving coil galvanometer consists of a rectanglar coil of N terms, each of area A suspended in a radial magnetic field of flux density B. Derive the expression for the torque of the coil when current I passes through it. Draw a labelled diagram. Answer 3. Using Biot-Savart’s law, derive an expression for the magnetic field due to current carrying circular coil, at a point along the axis of the coil. Answer 4. Show that the magnitude of the maximum force experienced by a conductor of length / carrying a current I placed in a magnetic field B is BIL, Answer Pages: 1 2 3

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