Electromagnetic waves are transverse in nature is evident by
|
(a) Polarization |
(b) Interference |
(c) Reflection |
(d) Diffraction |
Electromagnetic waves are transverse in nature is evident by
|
(a) Polarization |
(b) Interference |
(c) Reflection |
(d) Diffraction |
(a) Polarization
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The minimum charge on an object is
|
(a) 1 coulomb |
(b) 1 stat coulomb |
|
(c) |
(d) |
A divergent lens will produce
|
(a) Always a virtual image |
(b) Always real image |
|
(c) Sometimes real and sometimes virtual |
(d) None of the above |
Match List I with List II and select the correct answer using the codes given below the lists :
|
List I (Position of the object) |
List II (Magnification) |
|
(I) An object is placed at focus before a convex mirror |
(A) Magnification is -∞ |
|
(II) An object is placed at centre of curvature before a concave mirror |
(B) Magnification is 0.5 |
|
(III) An object is placed at focus before a concave mirror |
(C) Magnification is +1 |
|
(IV) An object is placed at centre of curvature before a convex mirror |
(D) Magnification is -1 |
|
|
(E) Magnification is 0.33 |
Codes :
|
(a) I-B, II-D, III-A, IV-E |
(b) I-A, II-D, III-C, IV-B |
|
(c) I-C, II-B, III-A, IV-E |
(d) I-B, II-E, III-D, IV-C |
Which of the following are not electromagnetic waves
|
(a) Cosmic rays |
(b) Gamma rays |
(c) b-rays |
(d) X-rays |