For protecting a sensitive equipment from the external magnetic field, it should be
Correct answer: B. Placed inside an iron case
- A. Placed inside an aluminium case
- B. Placed inside an iron case
- C. Wrapped with insulation around it when passing current through it
- D. Surrounded with fine copper sheet
Explanation
The correct answer is to place the equipment inside an iron case. Iron is a ferromagnetic material, which means it can absorb and redirect magnetic field lines, thus providing effective magnetic shielding. This property makes it suitable for protecting sensitive equipment from external magnetic fields. Option A, using an aluminium case, is incorrect because aluminium is not effective for magnetic shielding due to its non-ferromagnetic nature. Option C suggests using insulation, which is incorrect because insulation is used for preventing electrical conduction, not for blocking magnetic fields. Option D, using a copper sheet, is also incorrect because while copper is conductive and can provide electromagnetic interference shielding, it is not effective for shielding against static or low-frequency magnetic fields.
Last updated
About Physics of Solids
Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
Practise Physics of Solids
320 free Physics of Solids MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 9 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A 4.0 m long wire is subjected to stretching force and its length increases by 40 cm. The percent elongation which the wire undergoes is:
A ball falling in a lake of 200 m shows a decrease of 0.1% in its volume. The bulk modulus of elasticity of the material of the ball is: (take g = 10 m/s²)
A ball falling in a lake of 200 m shows a decrease of 0.1% in its volume. The bulk modulus of elasticity of the material of the ball is: (take g =10 m/s2)
A block weighing 40 kg extends a spring by 0.16m from its unscratched position. What is the value of k?
A body floats in a liquid contained in a beaker. The whole system, as shown, falls freely under gravity. The upthrust on the body due to the liquid is: