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Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm2, if the magnetic moment is 2 Am2.
Concept: Magnetisation and Magnetic Intensity
A meter gauge train is heading north with speed 54 km/hr in earth's magnetic field 3 x 10-4T. The e.m.f. induced across the axle joining the wheels is ..........
(a) 0.45 mV
(b) 4.5 mV
(c) 45 mV
(d) 450 m V
Concept: Magnetic Properties of Materials
Draw the diagrams showing the dipole moments in paramagnetic substance when external magnetic field is (a) absent (b) strong
Concept: Magnetic Dipole Moment of a Revolving Electron
Represent Radioactive Decay curve using relation `N = N_o e^(-lambdat)` graphically
Concept: Law of Radioactive Decay
The magnetic susceptibility of annealed iron at saturation is 4224. Find the permeability of
annealed iron at saturation. (μ0 = 4Π × 10−7 SI unit)
Concept: Magnetic Properties of Materials
The electron in the hydrogen atom is moving with a speed of 2.3x106 m/s in an orbit of radius 0.53 Å. Calculate the period of revolution of the electron. (Π = 3.142)
Concept: Magnetic Dipole Moment of a Revolving Electron
Concept: Bohr’s Atomic Model
What happens to a ferromagnetic substance heated above Curie temperature ?
Concept: Curie Temperature
The susceptibility of magnesium at 300 K is 1.2 x 10 -5 . What will be its susceptibility at 200 K.
Concept: Curie Temperature
What happens to a ferromagnetic material when its temperature increases above curie temperature?
Concept: Magnetic Properties of Materials
Answer in brief.
Discuss the Curie law for paramagnetic material.
Concept: Magnetic Properties of Materials
Determine the series limit of Balmer, Paschen, and Pfund series, given the limit for Lyman series is 912 Å.
Concept: Atomic Spectra
What is the difference between a nuclear reactor and a nuclear bomb?
Concept: Atomic Nucleus
An electron in hydrogen atom stays in its second orbit for 10−8 s. How many revolutions will it make around the nucleus at that time?
Concept: Mass-energy and Nuclear Binding Energy >> Nuclear Binding Energy
What is the magnetization of a bar magnet having a length of 6 cm and the area of cross-section 5 cm2?
Concept: Magnetisation and Magnetic Intensity
A magnetic material of susceptibility 3 × 10−4, and magnetic intensity is 4 × 10−4 Am−1. Then The magnetization in the units of Am−1 is ______.
Concept: Magnetisation and Magnetic Intensity
What does the ratio of magnetization to magnetic intensity indicate?
Concept: Magnetisation and Magnetic Intensity
The moment of a magnet (15 cm × 2 cm × 1 cm) is 1.2 A-m2. What is its intensity of magnetization?
Concept: Magnetisation and Magnetic Intensity
A solenoid has a core of material with relative permeability 500 and its windings carry a current of 1 A. The number of turns of the solenoid is 500 per meter. Calculate the magnetization of the material.
Concept: Magnetisation and Magnetic Intensity
Define magnetic intensity.
Concept: Magnetisation and Magnetic Intensity
