Question

1. why are the connections between resistors in a meter bridge made of thick copper strips?

2. why is it generallypreffered to obtain the balance point near the middle of the bridge wire in meter bridge experiments?

3. how are electromagnetic waves produced by oscillating charges?

4. state clearly how a microwave oven works to heat up a food item containg water molecules.

5. why are microwaves found useful for the radar systems in aircraft navigation?

Answer 1

In a series RC circuit connected to an AC voltage source, the currents in the resistor and capacitor are equal and in phase. In a series RC circuit connected to an AC voltage source, the total voltage should be equal to the sum of voltages on the resistor and capacitor.