The error in measuring the current with a tangent galvanometer is minimum when the deflection is about
|
(a) 0o |
(b) 30o |
(c) 45o |
(d) 60o |
The error in measuring the current with a tangent galvanometer is minimum when the deflection is about
|
(a) 0o |
(b) 30o |
(c) 45o |
(d) 60o |
(c) 45o
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Two wires of resistance R1 and R2 have temperature coefficient of resistance
and
, respectively. These are joined in series. The effective temperature coefficient of resistance is
|
(a) |
(b) |
(c) |
(d) |
A charge q is located at the centre of a cube. The electric flux through any face is
|
(a) |
(b) |
(c) |
(d) |
A capacitor when filled with a dielectric K = 3 has charge
, voltage
and field
. If the dielectric is replaced with another one having K = 9 the new values of charge, voltage and field will be respectively
|
(a) |
(b) |
(c) |
(d) |

You are given a resistance wire of length 50 cm and a battery of negligible resistance. In which of the following cases is largest amount of heat generated
|
(a) When the wire is connected to the battery directly |
|
(b) When the wire is divided into two parts and both the parts connected to the battery in parallel |
|
(c) When the wire is divided into four parts and all the four connected to the battery in parallel |
|
(d) When only half the wire is connected to the battery |
The fringe width in Young’s double slit experiment increases when
|
(a) Wavelength increases |
(b) Distance between the slits increases |
|
(c) Distance between the source and screen decreases |
(d) The width of the slits increases |