Final answer:
A thermal magnetic circuit breaker provides thermal and magnetic protection.
Step-by-step explanation:
A thermal magnetic circuit breaker provides two kinds of protection: thermal protection and magnetic protection.
Thermal protection is achieved by using a bimetallic strip that bends when it gets overheated due to excessive current flow. This bending action opens the electrical connection and interrupts the circuit, preventing further heating and potential fire hazards.
Magnetic protection is employed when the current rises to a very high level for a short duration. In this case, the circuit breaker uses an electromagnet to generate a strong magnetic field. This magnetic field attracts an iron strip, which then releases the spring-loaded contacts, breaking the circuit.