A short magnet of magnetic moment M, is placed on a straight line. The ratio of magnetic induction fields B₁, B₂, B₃ values on this line at points which are at distance 30 cm, 60 […]
The magnifying power of the astronomical telescope for normal adjustment is 50. The focal length of the eyepiece is 2 cm. The rquired length of the telescope for normal adjustment is
Options
(a) […]
A small angled prism of refractive index 1.4 is combined with another small angled prism of refractive index 1.6 to produce dispersion without deviation. If the angle of first prism is 6⁰, then the angle […]
The purpose of using heavy water in nuclear reactor is
Options
(a) to increase the energy released in nuclear fission (b) to cool the reactor to room temperature (c) to make the dynamo […]
A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second. The energy released per fission is 185 MeV. The value of P is
Options
(a) 59.2 MW (b) […]
Light of wavelength λ from a point source falls on a small circular obstacle of diameter d. Dark and bright circular rings around a central bright spot are formed on a screen beyond the obstacle. […]
Two capacitors having capacitances C₁ and C₂ are charged with 120V and 200V batteries respectively. When they are connectd in parallel now, it is found that the potential on each one of them is zero. […]
Copper and carbon wires are connected in series and the combined resistor is kept at 0⁰C. Assuming the combined resistance does not vary with temperature, the ratio of the resistances of carbon and copper wires […]
The Kα X-ray of molybdenum has a wavelength of 71×10⁻¹² m. If the energy of a molybdenum atom with K- electron removed is 23.32 keV, then the energy of molybdenum atom when an L-electron removed […]
In Moseley’s law √ν=a(z-b), the values of the screening constant for K-series and L-series of X-rays are respectively
Options
(a) 1,6.4 (b) 1,4 (c) 4,6 (d) 2,4
Correct Answer:
1,6.4
Explanation:
No explanation […]
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