Time period of oscillation of a magnet is 2 sec. When it is remagnetised
Time period of oscillation of a magnet is 2 sec. When it is remagnetised so that its pole strength is 4 times, its period will be
Options
(a) 4 sec (b) 2 sec […]
Physics
A proton and helium nucleus are shot into a magnetic field at right angles to the field
A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then, the ratio of their radii is
Options
(a) (1:1) (b) (1:2) […]
If a proton, a deuteron and an alpha particle, on being accelerated by the same
If a proton, a deuteron and an alpha particle, on being accelerated by the same potential difference, enter perpendicularly to a magnetic field. The ratio of their respective kinetic energies is
Options
(a) […]
Which of the following, is a vector quantity?
Which of the following, is a vector quantity?
Options
(a) Density (b) Magnetic flux (c) Intensity of magnetic field (d) Magnetic potential
Correct Answer:
Intensity of magnetic field
Explanation:
No explanation available. Be […]
The ferromagnetic substance is
The ferromagnetic substance is
Options
(a) Zn (b) Cu (c) Co (d) Al
Correct Answer:
Co
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting […]
A wire of length L metre carrying a current I ampere is bent in the form
A wire of length L metre carrying a current I ampere is bent in the form of a circle. The magnitude of th magnetic moment is
Options
(a) L²I²/4π (b) LI/4π (c) L²I/4π […]
The ratio of magnetic dipole moment of an electron of charge e and mass m
The ratio of magnetic dipole moment of an electron of charge e and mass m in Bohr’s orbit in hydrogen atom to its angular momentum is
Options
(a) e/m (b) m/e (c) 2m/e […]
The ultimate individual unit of magnetism in any magnet is called
The ultimate individual unit of magnetism in any magnet is called
Options
(a) North pole (b) South pole (c) Dipole (d) Quadropole
Correct Answer:
Dipole
Explanation:
No explanation available. Be the first to […]
An iron rod of volume 10⁻⁴ m³ and relative permeability 1000 is placed inside a long
An iron rod of volume 10⁻⁴ m³ and relative permeability 1000 is placed inside a long solenoid having 5 turns/cm. If a current of 0.5 A is passed through the solenoid, then the magnetic moment […]
Two thin long conductors seprated by a distance d carry currents
Two thin long conductors seprated by a distance d carry currents I₁ and I₂ in the same direction. They exert a force F on each other. Now, the current in one of them is increased […]