Part A-Power lines carry electricity at about 120,000 volts. If a power line were stepped down by a transformer to 120 volts, how many turns would there be on the secondary coil if there were 1000 turns on the primary? Show calculations.
Part B-If the secondary coil is connected to a resistor with a resistance of 10 ohms, what is the current in the secondary coil? Show calculations.
Part C-What is the power in the secondary coil? Show calculations.
Part D-What is the current drawn by the primary coil? show calculations.
Part E-Why is it useful for the power lines to transfer electricity with a current of the magnitude of the answer in part D?