Question

4 in a city grid, alternating current (ac) can generate a million volts of electricity. tesla used transformers to make this current weaker. why? a to capture static electricity from clothing b to make ac electricity safer to use c to ensure that more power plants would be built d to reduce damage caused by friction in dc motors

Explanation:

• Option A: Capturing static electricity from clothing is not related to transformers reducing AC voltage in a city grid.
• Option B: High - voltage AC (like a million volts) is dangerous for direct use. Transformers step down the voltage to make it safer for homes, industries, etc. to use.
• Option C: Transformers reducing voltage has no connection with ensuring more power plants are built.
• Option D: Transformers are for AC, and this option mentions DC motors and friction, which is irrelevant to the purpose of reducing AC voltage with transformers.

Answer:

B. To make AC electricity safer to use