A cylindrical conductor has uniform cross-section. Resistivity of its material increase linearly from left end to right end. If a constant current is flowing through it and at a section distance x from left end, magnitude of electric field intensity is E, which of the following graphs is correct
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(a)
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(b)
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(c)
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(d)
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(b)
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An electric dipole consisting of two opposite charges of 2 
each separated by a distance of 3 cm is placed in an electric field of 2 
N/C. The maximum torque on the dipole will be
|
(a) 12 |
(b) 12 |
(c) 24 |
(d) 24 |
If two light waves having same frequency have intensity ratio 4 : 1 and they interfere, the ratio of maximum to minimum intensity in the pattern will be
|
(a) 9 : 1 |
(b) 3 : 1 |
(c) 25 : 9 |
(d) 16 : 25 |
The vertical component of earth's magnetic field is zero at or The earth's magnetic field always has a vertical component except at the
| (a) Magnetic poles | (b) Geographical poles | (c) Every place | (d) Magnetic equator |
