A proton is moving in a uniform magnetic field B in a circular path of radius a
A proton is moving in a uniform magnetic field B in a circular path of radius a in a direction…
6 years ago
ML2012
If a magnet is suspended at an angle 30⁰ to the magnetic meridian, the dip needle
If a magnet is suspended at an angle 30⁰ to the magnetic meridian, the dip needle makes angle of 45⁰…
6 years ago
In intrinsic semiconductor at room temperature number of electrons and holes are
In intrinsic semiconductor at room temperature number of electrons and holes are Options (a) equal (b) zero (c) unequal (d)…
6 years ago
what should be the velocity of an electron so that its momentum becomes equal
what should be the velocity of an electron so that its momentum becomes equal to that of a photon of…
6 years ago
A voltmeter of range 2 V and resistance 300Ω cannot be converted into ammeter
A voltmeter of range 2 V and resistance 300Ω cannot be converted into ammeter of range Options (a) 1A (b)…
6 years ago
What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
What is the Q-value of the reaction? ¹H+⁷Li → ⁴He+⁴He The atomic masses of ¹H,⁴He and ⁷Li are 1.0078254u, 4.0026034u…
6 years ago
The wavelength of first line of Balmer series is 6563Å. The wavelength of first line
The wavelength of first line of Balmer series is 6563Å. The wavelength of first line of Lyman series will be…
6 years ago
The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is Options (a)…
6 years ago
An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
An electric motor runs on DC source of emf 200 V and draws a current of 10 A. If the…
6 years ago
The half-life of radioactive element is 600 yr. The fraction of sample
The half-life of radioactive element is 600 yr. The fraction of sample that would remain after 3000 yr is Options…
6 years ago