For measurement of potential difference, potentiometer is preferred in comparison to voltmeter because
|
(a) Potentiometer is more sensitive than voltmeter |
|
(b) The resistance of potentiometer is less than voltmeter |
|
(c) Potentiometer is cheaper than voltmeter |
|
(d) Potentiometer does not take current from the circuit |
(d) Potentiometer does not take current from the circuit
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The resistances of a wire at temperatures t℃ and 0℃ are related by
|
(a) |
(b) |
(c) |
(d) |
The electric field in a region is radially outward with magnitude E = 
. The charge contained in a sphere of radius 
centered at the origin is
|
(a) |
(b) |
(c) |
(d) |
What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line
|
(a) 0o |
(b) 90o |
(c) 180o |
(d) None of these |
