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. The impedance offered by the circuit is
Options
(a) 1500Ω (b) 1700Ω (c) 2102Ω (d) 2500Ω
Correct […]
SI unit of magnetic dipole moment is
Options
(a) A m⁻¹ (b) A m² (c) T m A⁻¹ (d) m A⁻²
Correct Answer:
A m²
Explanation:
The SI unit of magnetic dipole moment is […]
The velocity v of waves produced in water depends on their wavelength λ, the density of water d and acceleration due to gravity g. These quantities are related as (where K is a dimensionless constant) […]
In the elastic collision of objects
Options
(a) Only momentum remains constant (b) Only K.E remains constant (c) Both remain constant (d) None of these
Correct Answer:
Both remain constant
Explanation:
No explanation […]
If a body is rolling on the surface, its total energy will be
Options
(a)(1/2) mv² – (Gm₁m₂/R) (b) (1/2) mv² + (1/2) Iω² (c) (1/2) mv² – (1/2) mR²ω² (d) None
Correct […]
A vibrating string of certain length l under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75 cm inside a tube closed at […]
A string is stretched between fixed points seperated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the […]
In Young’s double slit interference experiment, using two coherent waves of different amplitudes, the intensities ratio between bright and dark fringes is 3. Then, the valule of the wave amplitudes ratio heat arrive there is […]
The polarising angle of glass is 57⁰. A ray of light which is incident at this angle will have an angle of refraction as
Options
(a) 43⁰ (b) 25⁰ (c) 38⁰ (d) 33⁰
Correct […]
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