Solapur University M. Sc. Nano Physics (Semester-II) Paper on Electrodynamics Oct 2019
| Sr. No. | Question |
| 1 | The energy (U) of an ideal dipole having dipole moment P in electric field E is given by _______
(a) U = – P.E (b) U = B.E (c) U= -q.E (d) U= q.E |
| 2 | Maxwell’s equation, V.B = 0 is obtained from
(a) Gauss law in electro-statics (b) Faraday law in electromagnetic induction (c) Amere’s Law (d) Gauss law in magneto-statics |
| 3 | Poynting’s vector S is _______
(a) Parallel to electric field vector (b) Parallel to magnetic field vector (c) Parallel to propagation vector K (d) Perpendicular to propagation vector K |
| 4 | Newton’s third law does not hold good in _______
(a) Electro-statics (b) Magneto-statics (c) Electro-dynamics (d) All above three |
| 5 | In the definition of skin depth, it is distance over which field amplitude reduces to _________
(a) Nearly one fifth (b) 1/e (c) One half (d) One fourth |
| 6 | For physical dipole the distance (d) between the charges is related to distance (r) of point of observation _______
(a) d<<r (b) d>>r (c) d=r (d) none of these |
| 7 | The plot of power radiated (P) against acceleration (a) of a charged particle in (v<<c) limit is _______
(a) parabola (b) Ellipse (c) Hyperbola (d) Straight line |
| 8 | The direction of poynting vector in case of electromagnetic wave propagating in vacuum is _______
(a) Perpendicular to both electric field and magnetic field (b) Parallel to both electric field and magnetic field (c) Perpendicular to electric field but not to magnetic field (d) Perpendicular to magnetic field but not to electric field |
| 9 | The graph of intensity of electromagnetic wave against electric field amplitude is _______
(a) Straight line (b) Parabola (c) Ellipse (d) hyperbola |
| Published on 10th Oct 2021 | |
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