Astudent wants you to demonstrate that an electric current will produce a magnetic field.

which set of objects could be used to demostrate this?
a) a battery, a coil of wire and a compass.
eliminate
b) a compass, some paper clips and a battery.
c) a battery, an iron nail and a long copper wire.
d) an iron nail, a permanent magnet and a battery.

A)A battery, a coil of wire and a compass.

Explanation:

When current flows through the coil it will produce magnetic field in the region of coil

This magnetic field is given by equation

here we know that

n = number of turns per unit length

I = current in the coil

So here we need

1). A coil of wire

2). A battery to produce current

Now this magnetic field is detected by a magnetic compass so next part we need is

3). Magnetic compass

pe = weightxheight = 2000x1000=2,000,000joules