- ARadius of the coil
- BNumber of turns of the coil
- CExternal magnetic field
- DCouple per unit twist
Explanation:
Sensitivity of a galvanometer increases when radius of the coil, number of turns of the coil and external magnetic field increases whereas couple per unit twist decreases.
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'Albedo' is
|
(a) Reflecting power of a heavenly body |
|
(b) Transmitive power of a heavenly body |
|
(c) Absorptive power of a heavenly body |
|
(d) Refracting power of a heavenly body |
$\frac{1}{\lambda}$
$\Big(\text{ln}\frac{2}{\lambda}\Big)$
$\lambda(\text{ln}2)$
$\frac{\lambda}{(\text{ln})2}$
A magnifying glass is to be used at the fixed object distance of 1 inch. If it is to produce an erect image magnified 5 times its focal length should be
|
(a) 0.2 inch |
(b) 0.8 inch |
(c) 1.25 inch |
(d) 5 inch |


The angle which subtends the periphery of the spherical mirror at the centre of curvature is called:
In which radioactive disintegration, neutron dissociates into proton and electron
|
(a) |
(b) β - emission |
(c) γ - emission |
(d) Positron emission |