A. use a very long and fine suspension B. use a coil of very large area C. use a coil with very large number of turns D. use a very strong magnetic field
A. a straight line parallel to the field B. a parabola in a plane perpendicular to the field C. a circle in a plane perpendicular to the field D. a straight line along its initial direction
A. very low damping B. very high damping C. no damping at all D. radial field disintegration
A. weaken it B. strengthen it C. reverse its polarity D. demagnetize it completely
A. 4 volt B. 5 volt C. 2 volt D. 0.4 volt
A. fluctuates off and on B. varies in magnitude alone C. changes its direction again and again D. changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals
A. λ-rays B. Positive rays C. Cathode rays D. More than sound waves
A. Electric and magnetic fields moving parallel to each other B. Magnetic field moving with velocity of light in space C. Electric field moving with velocity of light D. Electric and magnetic fields moving perpendicular to each other
A. Sound waves B. Electromagnetic waves C. Radio waves D. Modulated waves
A. Twice B. One half C. Four times D. None