- A magnetic needle of length 10 cm, suspended at its middle point through a thread,...
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- A magnetic needle of length 10 cm, suspended at its middle point through a thread, stays at an angle of 45 with the horizontal. The horizontal component of the earth's magnetic field is 18 T. (a) Find the vertical component of this field. (b) If the pole strength of the needle is 16 A-m, what vertical force should be applied to an end so as to keep it in horizontal position? - A magnetic needle of length 10 cm, suspended at its middle point through a thread, stays at an angle of 45 with the horizontal. The horizontal component of the earth's magnetic field is 18 T. (a) Find the vertical component of this field. (b) If the pole strength of the needle is 16 A-m, what vertical force should be applied to an end so as to keep it in horizontal position?
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