Magnetic permeability is maximum for
|
(a) Diamagnetic substance |
(b) Paramagnetic substance |
|
(c) Ferromagnetic substance |
(d) All of these |
Magnetic permeability is maximum for
|
(a) Diamagnetic substance |
(b) Paramagnetic substance |
|
(c) Ferromagnetic substance |
(d) All of these |
(c) Ferromagnetic substance
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A capacitor of capacity
is charged upto V volt and then connected to an uncharged capacitor of capacity
. Then final potential difference across each will be
|
(a) |
(b) |
(c) |
(d) |
The wavelength of sodium light in air is 5890 Å. The velocity of light in air is 3
The wavelength of light in a glass of refractive index 1.6 would be close to
|
(a) 5890 Å |
(b) 3681 Å |
(c) 9424 Å |
(d) 15078 Å |
A thermocouple of resistance 1.6Ω is connected in series with a galvanometer of 8Ω resistance. The thermocouple develops and e.m.f. of 10 μV per degree temperature difference between two junctions. When one junction is kept at 0℃ and the other in a molten metal, the galvanometer reads 8 millivolt. The temperature of molten metal, when e.m.f. varies linearly with temperature difference, will be
|
(a) 960℃ |
(b) 1050℃ |
(c) 1275℃ |
(d) 1545℃ |
A full wave rectifier circuit along with the input and output voltages is shown in the figure
A plane wavefront (λ = 6 (a) 6mm (b) 12 mm (c) 3 mm (d) 9 mm→
falls on a slit 0.4 mm wide. A convex lens of focal length 0.8 m placed behind the slit focusses the light on a screen. What is the linear diameter of second maximum