A compass needle points north in Kansas. Which way would it point in Australia?

Question

A compass needle points north in Kansas. Which way would it point in Australia? (a) North (b) South (c) East (d) West (e) Compasses do not work in Australia Suppose a power line carries 0.1 A of current in a west to east direction across Kansas. Which way would the magnetic force act on this power line? Assume the earth's magnetic field points due north (a) Up (b) Down (c) North (d) South Which way will B point in the volume of the green cylinder? (a) left (b) out of the page (c) right (d) into the page (e) impossible to say An unknown metal causes the magnetic field produced by a solenoid to increase by a factor of 700 when the metal is inserted into the solenoid, and the metal continues to produce a magnetic field when the solenoid's current is turned off. This metal might very likely contain appreciable amount of (a) copper (b) iron (c) aluminum (d) bismuth (e) weapon-grade plutonium

Explanation / Answer

16)

Becaue anywhere we put compass it should point north due to earths magnetic field we put it in any country it will point north

17)

answer will be be up use left hand flaming rule

thumb ->> Force

Index Finger ->> magnetic field

middle finger ->> current in conductor

earth's magnetic field is from south to north pole

18)

Left is the answer

In our case the direction of current is opposite so B also reverses This is with respect to Right Hand thumb rule

19)

It should be ferromagnetic so it has electron arranged is such way that aftr induction it increases the net magnetic field

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