- ✓Infrared rays
- BX-rays
- CUltra-violet rays
- DGamma rays
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The self inductance of a coil is 5 henry, a current of 1 amp change to 2 amp within 5 second through the coil. The value of induced e.m.f. will be
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(a) 10 volt |
(b) 0.10 volt |
(c) 1.0 volt |
(d) 100 volt |
The horizontal component of the earth's magnetic field is 0.22 Gauss and total magnetic field is 0.4 Gauss. The angle of dip. is
|
(a) |
(b) |
(c) |
(d) |
Two rays A and B being reflected by a mirror and going as A' and B'. The mirror:

Young’s double slit experiment is performed with light of wavelength 550 nm. The separation between the slits is 1.10 mm and screen is placed at distance of 1 m. What is the distance between the consecutive bright or dark fringes
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(a) 1.5 mm |
(b) 1.0 mm |
(c) 0.5 mm |
(d) None of these |
The electrochemical equivalent of a material in an electrolyte depends on
|
(a) The nature of the material |
|
(b) The current through the electrolyte |
|
(c) The amount of charge passed through electrolyte |
|
(d) The amount of material present in electrolyte |
The minimum temperature of a body at which it emits light is
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(a) 1200°C |
(b) 1000°C |
(c) 500°C |
(d) 200°C |
A nichrome wire 50 cm long and one square millimetre cross-section carries a current of 4A when connected to a 2V battery. The resistivity of nichrome wire in ohm metre is
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(a) 1 |
(b) 4 |
(c) 3 |
(d) 2 |