Two wires a and b with same dimension of 50 cm length and 0.5 cm radius are used to study
the effect of magnetic field, b. wire a is bent to form a 2 turns circular coil while wire b into
10 turns solenoid. both wires are supplied with a 5 a current,
i) which wire will produce a higher magnetic field at the centre?
ii) sketch the patterns of the magnetic field for both wires.
iii) suggest 2 changes that you can make to wire a so that its magnetic field is equal to wire
b.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

i think the answer is a and b

i wish you luck