1. An electric train operates on 825 V. What is its power consumption when the current flowing through the train's motor is 2,070 A? _______________W?

2. The generator at a power plant produces AC at30,000V.A transformer steps this up to365,000Vfor transmission over power lines. If there are2,100turns of wire in the input coil of the transformer, how many turns must there be in the output coil? _____________turns?

3. The blackbody radiation emitted from a furnace peaks at a wavelength of3.210^-6m(0.0000032m).What is the temperature inside the furnace? ______________K?

4. The charger cord used to recharge a cell phone contains a transformer that reduces 240 V AC to 5 V AC. For each 1,500 turns in the input coil, how many turns are there in the output coil? (Round your answer to at least one decimal place.) ___________ turns?

5. Compute the frequency (in MHz) of an EM wave with a wavelength of 4.3 in. (0.1092 m). ______________MHz?