Question

A student 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.

Answer 1

A compass can show that an electric field is present. So, a battery, a coil of wire and a compass together could demonstrate that an electric current produces a magnetic field.

Answer 2

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

Step-by-step explanation:

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

This magnetic field is given by equation

`B = \mu_0 n I`

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