An induction heater delivers eddy-current heating power of 600 W to a 1.5 kg steel block. How much does the block's temperature rise in 2 minutes? (Specific heat of steel ≈ 500 J/kg·°C.) Assume no heat is lost to surroundings. Step 1: Total heat energy Q = power × time = 600 W × 120 s = 72,000 J. Step 2: Temperature rise ΔT = Q / (m × c) = 72,000 / (1.5 × 500) = 72,000 / 750 = 96 °C. So the block heats by about 96 °C in just two minutes — this is why eddy currents melt metal in furnaces. Notice the physics: the changing magnetic field does work on the charges (via the induced electric field), and collisions turn that ordered motion into heat. If the same block were laminated into insulated sheets, the eddy loops would be broken and the heating would be far smaller.