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Consider the following statements: 1. Both ferromagnetic and ferrimagnetic materials have domain structures; each domain has randomly oriented magnetic moments when no external field is applied. 2. Both ferromagnetic and ferrimagnetic materials make those domains that have a favourable orientation to the applied field grow in size. 3. The net magnetic moment in ferromagnetic materials is higher than that in ferrimagnetic materials. 4. The net magnetic moment in ferrimagnetic materials is higher than that in ferromagnetic material. Which of the above statements are correct?
In a region with magnetic declination of 2°E, the magnetic Fore bearing (FB) of a line AB was measured as N79°50’E. There was local attraction at A. TO determined the correct magnetic bearing of the line, a point O was selected at which there was no local attraction. The magnetic FB of line AO and OA were observed to be S52° 40’E and N50°20’W, respectively. What is the true FB of line AB?
Consider the following statement: a) Magnetic field lines are always form closed curve. b) Magnetic field lines start from north pole outside the magnet c) Magnetic field lines start from south pole outside the magnet Which of the following is a property of magnetic field lines?
With reference to the properties of the magnetic lines of force, consider the following statements: 1. Magnetic lines of force outside the magnet, are from the north pole to the south pole. 2. If magnetic lines of force are parallel and equidistant, the magnetic field is uniform. Which of the following statements given above is/are correct?
A current carrying coil having magnetic moment M is placed in a magnetic field B. Initially the magnetic field is perpendicular to the plane of the coil and then coil turned about an axis such that the angle between the magnetic field and the plane of the coil become zero. Then choose the correct statement.
A line PQ in an old map had magnetic bearing of N 57° E when the local magnetic declination was 2°E. If the magnetic declination is now 4°W, what will be the magnetic bearing of the line PQ now?
Choose the correct option with respect to magnetic surface anisotropy (MSA).
Consider the following statements regarding hysteresis loops of hard and soft magnetic materials: 1. Hysteresis loss of hard magnetic material will be less than that of soft material 2. Coercivity of hard material will be greater than that of soft material 3. Retentivity of the two materials will always be equal Which of these statements are correct?
Consider the following statements for piezoelectric materials: 1. All piezoelectric materials are ferroelectric materials also. 2. Piezoelectric materials have a high value of dielectric constant. Which of the above statements is/are correct?
Which one of the following are true of authentic materials for language learning? a. Materials should take into consideration the socio-cultural milieu of the region. b. Materials should provide a route map for learner to move on. c. Any materials could be taught in any region.