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13. Magnetic Effects of Electric Current
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Q4 of 47 Page 408

A ship is to reach a place 8° south of west. In what direction should the ship be steered if declination at the place is 18° west?

Initially the ship is at 8° south of west. Declining 180 from 80 south of west results in actual direction. Now from north we get the direction of 90-18-8 = 90-26 = 64° West of North.

More from this chapter

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2

If the key in the arrangement as shown below is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are

3

Three plotting compasses are to a solenoid carrying a current. How many of the compass needles will change direction, if the current through the solenoid is increased?

(Ignore the effect of the earth’s magnetic field).

5

A rectangular loop carrying a current is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current its created in wire as shown in figure below, then the loop will

6

Four metal rods are placed, in turn, inside a coil of copper wire,


The table below gives the results of the experiment. Which rod would be the most suitable to use for the case of a coil in a circuit breaker?


Questions · 47
13. Magnetic Effects of Electric Current
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