Explanation:
A Van de Graff generators produces large voltage and less current. A Van de Graff generator is an electrostatic generator which creates very high electric potentials. It produces very high voltage direct current electricity at low current levels.
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Antimony and bismuth are usually used in a thermocouple, because
|
(a) Negative thermal e.m.f. produced |
(b) Constant thermal e.m.f. produced |
|
(c) Lower thermal e.m.f. produced |
(d) Higher thermal e.m.f. produced |
As per this diagram a point charge +q is placed at the origin O. Work done in taking another point charge -Q from the point A [co-ordinates (0, a) ] to another point B [co-ordinates (a, 0)] along the straight path AB is
|
(a) Zero |
(b) |
(c) |
(d) |
The sensation of vision in the retina is carried to the brain by
|
(a) Ciliary muscles |
(b) Blind spot |
(c) Cylindrical lens |
(d) Optic nerve |
A sensitive magnetic instrument can be shielded very effectively from outside magnetic fields by placing it inside a box of
|
(a) Teak wood |
(b) Plastic material |
|
(c) Soft iron of high permeability |
(d) A metal of high conductivity |
The number of electrons in 1.6 C charge will be
|
(a) |
(b) |
(c) 1.1 |
(d) 1.1 |
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