Final answer:
The magnet created when current flows through a wire coil is known as an electromagnet, and such a configuration is commonly found within devices such as electric motors.
Step-by-step explanation:
A magnet created when there is current through a wire coil is called an electromagnet. A solenoid, which is a uniform cylindrical coil of wire, becomes an electromagnet when electric current is passed through it. The magnetic field produced inside a solenoid can be very uniform and strong, and the magnetic field outside the coil is nearly zero. Electromagnets are widely used in various devices, including electric motors and transformers. An electric motor utilizes loops of wire in a magnetic field; when current is passed through the loops, the magnetic field exerts torque on the loops, which rotates a shaft, converting electrical energy into mechanical work. On the other hand, a transformer is a device that transforms voltages from one value to another but does not create a magnetic field by itself.
Therefore, the correct answer to the question 'A magnet created when there is current through a wire coil' is option (b) electromagnet.