Curie temperature above which
Options
(a) paramagnetic material becomes ferromagnetic material (b) ferromagnetic material becomes diamagnetic material (c) Ferromagnetic material becomes paramagnetic material (d) paramagnetic material becomes diamagnetic material
Correct Answer:
Ferromagnetic material becomes […]
An alternating electric field, of frequency v, is applied across the dees (radius = R) of a cyclotron that is being used to accelerate protons (mass = m). The operating magnetic field (B) used in […]
The direction of magnetic line of force of a bar magnet is
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(a) from south to north pole (b) from north to south pole (c) across the bar magnet (d) from south […]
Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the centre of the ring […]
Weber/m² is equal to
Options
(a) volt (b) henry (c) tesla (d) all of these
Correct Answer:
tesla
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Graph of force per unit length between two long parallel current carrying conductors and the distance between them is
Options
(a) straight line (b) parabola (c) ellipse (d) rectangular hyperbola
Correct Answer:
rectangular […]
Magnetic susceptibility of a material is given as
Options
(a) M/H (b) M²/H² (c) MxH (d) H/M
Correct Answer:
M/H
Explanation:
Magnetic susceptibility Xe = M / H
where H is the magnetic field, […]
A uniform electric field and uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction […]
Sound production from tape recorder makes use of
Options
(a) crests and troughs (b) magnetic energy (c) electrical energy (d) none of these
Correct Answer:
magnetic energy
Explanation:
No explanation available. Be the […]
When an electron beam passes through an electric field they gain kinetic energy. lf the same electron beam passes through a magnetic field, then their
Options
(a) energy and momentum both remain unchanged […]
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