PHY204 ELECTROMAGNETISM TMA2 QUESTIONS AND ANSWER

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Question 1 ceramic capacitors are useful in _____circuit?

Answer is transistor

Question 2 a dipole consist of charge ±q separated by a distance a and is placed in an electric field whose intensity is E what is the magnitude of the couple that tend to align the dipole at an angle tesla to the direction of the field?

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question 3the magnetic dipole moment of the atom due to the spin of ____election?

answer is unpaired

Question 4 the magnetic field produced by the magnetic material is obtained by_____?

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Answer is empere's law

Question 5 ______is an example of electric insulator?

Answer is mica

Question 6 capacitance of a capacitor depend on all of the following except?

Cancer is current through the capacitors

Question 7 two cylindrical capacitors are of equal length and have the same dielectric in an one of them the radii of the inner and outer cylinder are 8cm and 10cm respectively and in the order they are 4 and 5 cm find the ratios of their capacitance?

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Answer is 1:01

question 8 which of the fields cause polarizations of the atom?

Answer is local field

Question 9 which of the following is the correct unit of the electric displacement vector D?

Answer is c.m-²

Question 10 when a diamagnetic atom is placed in an external magnetic field normal to it audit the field induce a magnetic moment opposing the field itself this statement is______?

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answer is lenzs law

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