Two electrolytic cells containing 
and 
respectively are connected in series and a current is passed through them until 1 mg of copper is deposited in the first cell. The amount of silver deposited in the second cell during this time is approximately [Atomic weights of copper and silver are respectively 63.57 and 107.88]
|
(a) 1.7 mg |
(b) 3.4 mg |
(c) 5.1 mg |
(d) 6.8 mg |
(b) 3.4 mg
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Newton postulated his corpuscular theory on the basis of
|
(a) Newton’s rings |
(b) Colours of thin films |
|
(c) Rectilinear propagation of light |
(d) Dispersion of white light |
The magnetic moment (μ) of a revolving electron around the nucleus varies with principal quantum number n as
|
(a) μ ∝ n |
(b) μ ∝ 1/n |
(c) μ ∝ |
(d) μ ∝ 1/ |
Our eye is most sensitive for which of the following wavelength
|
(a) 4500 Å |
|
(b) 5500 Å |
|
(c) 6500 Å |
|
(d) Equally sensitive for all wave lengths of visible spectrum |
The refractive index of a material of a prism of angles 45°– 45° – 90° is 1.5. The path of the ray of light incident normally on the hypotenuse side is shown in
|
(a)
|
(b)
|
(b)
|
(d)
|
Two lenses have focal lengths 
and 
and their dispersive powers are 
and 
respectively. They will together form an achromatic combination if
|
(a) |
(b) |
|
(c) |
(d) |
When plate voltage in diode valve is increased from 100 volt to 150 volt then plate current increases from 7.5 mA to 12 mA. The dynamic plastic resistance will be
|
(a) 10 kW |
(b) 11 kW |
(c) 15 kW |
(d) 11.1 kW |
