The modern bird rise in
The modern bird rise in
Options
(a) palaeozoic (b) coenozoic (c) mesozoic (d) archaeozoic
Correct Answer:
mesozoic
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
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Three capacitors of capacitances 3 μF, 10 μF and 15 μF are connected in series
Three capacitors of capacitances 3 μF, 10 μF and 15 μF are connected in series to a voltage source of 100V. The charge on 15 μF is
Options
(a) 500 μC (b) 100 μC […]
The acceleration of an electron in an electric field of magnitude 50 V/cm,
The acceleration of an electron in an electric field of magnitude 50 V/cm, if e/m value of the electron is 1.76×10¹¹ C/kg will be
Options
(a) 8.8×10¹⁴ m/sec² (b) 3×10¹³ m/sec² (c) 5.4×10¹² m/sec² […]
An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed
An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed from 10 A in one direction to 10A in opposite direction in 0.5 sec. Self inductance of […]
The photoelectric threshold wevelength for potassium (work function being 2 eV) is
The photoelectric threshold wevelength for potassium (work function being 2 eV) is
Options
(a) 620 nm (b) 310 nm (c) 1200 nm (d) 2100 nm
Correct Answer:
620 nm
Explanation:
No explanation available. […]
Calcium plate has a maximum possible radiation wavelength 400 nm to eject electrons.
Calcium plate has a maximum possible radiation wavelength 400 nm to eject electrons. Its work function is
Options
(a) 23 eV (b) 3.1 eV (c) 4.5 eV (d) None of these
Correct Answer: […]
Bragg’s law for X-rays is
Bragg’s law for X-rays is
Options
(a) d sin θ = 2nλ (b) 2d sin θ = nλ (c) n sin θ = 2λd (d) None of these
Correct Answer:
2d sin θ […]
At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
Options
(a) zero (b) 18.5 (c) 15 (d) None of these
Correct Answer:
18.5
Explanation:
Heat […]
Unit of electrical conductivity is
Unit of electrical conductivity is
Options
(a) Ω⁻¹ (b) Ω⁻¹ cm (c) Ω⁻¹ cm⁻² (d) Ω⁻¹ cm⁻¹
Correct Answer:
Ω⁻¹ cm⁻¹
Explanation:
No explanation available. Be the first to write the explanation for […]
Planck’s constant has same dimensions as those of
Planck’s constant has same dimensions as those of
Options
(a) Angular momentum (b) Linear momentum (c) Work (d) Coefficient of viscocity
Correct Answer:
Angular momentum
Explanation:
No explanation available. Be the first to […]