A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt
A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt battery. The energy stored in the coil is
Options
(a) 250 erg (b) 250 J (c) 125 […]
Physics
Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube. The K-shell electrons of tungsten have -72.5 keV energy. The X-rays emitted by the tube contains only
Options
A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls
A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls nor rises. The charge on the drop will be (Take the mass of the charge=9.9×10⁻¹⁵ kg and […]
An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic
An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb m⁻². The de-Broglie wavelength associated with the particle will be
Options
(a) […]
A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m².
A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m². If the density of charge carriers of the wire is 5×10²⁶ m⁻³, the drift velocity of the electrons will […]
A 36 Ω galvanometer is shunted by resistance of 4 Ω. The percentage of the total current
A 36 Ω galvanometer is shunted by resistance of 4 Ω. The percentage of the total current, which passes through the galvanometer is
Options
(a) 8% (b) 9% (c) 10% (d) 91%
Correct […]
Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂,
Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂, respectively. The ratio, R₁/R₂ is equal to
Options
(a) (3:2) (b) (1:3) (c) (1:2) (d) (2:3)
Correct Answer:
(3:2)
A deutron is bombarded on ₈O¹⁶ nucleus and α-particle is emitted. The product nucleus is
A deutron is bombarded on ₈O¹⁶ nucleus and α-particle is emitted. The product nucleus is
Options
(a) ₇N¹³ (b) ₅B¹⁰ (c) ₄Be⁹ (d) ₇N¹⁴
Correct Answer:
₇N¹⁴
Explanation:
No explanation available. Be the […]
A galvanometer has a resistance 50Ω. A resistance of 5Ω is connected parallel to it.
A galvanometer has a resistance 50Ω. A resistance of 5Ω is connected parallel to it. Fraction of the total current flowing through galvanometer is
Options
(a) (1/10) (b) (1/11) (c) (1/50) (d) (2/15)
A 50Hz AC signal is applied in a circuit of inductance of (1/π)H and resistance 2100Ω
A 50Hz AC signal is applied in a circuit of inductance of (1/π)H and resistance 2100Ω. The impedance offered by the circuit is
Options
(a) 1500Ω (b) 1700Ω (c) 2102Ω (d) 2500Ω
Correct […]