If radius of the ₁₃Al²⁷ nucleus is taken to be Rᴀı, then the radius of ₅₃Te¹²⁵ nucleus is nearly
Options
(a) (53/13)¹⁄₃ Rᴀı (b) 5/3Rᴀı (c) 3/5Rᴀı (d) (13/53)¹⁄₃ Rᴀı
Correct Answer:
5/3Rᴀı
Explanation: […]
For a parallel beam of monochromatic light of wavelength λ diffraction is produced by a single slit whose width a is of the order of the wavelength of the light. If D is the distance […]
Consider 3rd orbit of He⁺(helium), using non-relativistic approach, the speed of electron in this orbit will be (given K=9×10⁹ constant, Z=2 and h=6.6×10⁻³⁴ J-s)
Options
(a) 2.92×10⁶ ms⁻¹ (b) 1.46×10⁶ ms⁻¹ (c) 0.73×10⁶ […]
An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude
Options
(a) μ₀ne/2πr (b) zero (c) μ₀n²e/r (d) μ₀ne/2r
Across a metallic conductor of non-uniform cross-section, a constant potential difference is applied. The quantity whilch remain (s) constant along the conductor is
Options
(a) current density (b) current (c) drift velocity (d) […]
A,B and C are voltmeters of resistance R, 1.5 R and 3R respectively, as shown in the figure. When some potential difference is applied between X and Y, then the voltmeter readings are VA,VB and […]
A wire carrying current I has the shape as shown in adjoining figure. Linear parts of the wire are very long and parallel to X-axis while semicircular portion of radius R is lying in yz-plane. […]
A resistance R draws power P when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes Z the power drawn […]
A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c= velocity of light)
Options
(a) E/c (b) 2E/c (c) 2E/c² (d) E/c²
Correct […]
A potentiometer wire has length 4m resistance 8Ω. The resistance that must be connected in series with the wire and an accumulator of emf 2V, so as to get a potential gradientof 1mV per cm […]
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