What would be the result if a 24 volt, 20 ohm contactor coil was wired in series with a 24 volt, 200 ohm control relay?

When a 24 volt, 20 ohm contactor coil is wired in series with a 24 volt, 200 ohm control relay, the total resistance in the circuit is the sum of the resistances of both coils, which is 20 ohm + 200 ohm = 220 ohm. Using Ohm's law, the total current that would flow through the circuit can be calculated as follows:

Voltage (V) = Current (I) × Resistance (R)

Rearranging this gives us:

Current (I) = Voltage (V) / Resistance (R)

Substituting the values we have:

I = 24 volts / 220 ohms = 0.1090 amperes (approximately).

This calculated current is the same through both components due to the series configuration. Now we can analyze the voltage drop across each component.

For the contactor coil:

Voltage drop (V) = Current (I) × Resistance (R) of contactor

V_contact = 0.1090 A × 20 ohm = 2.18 volts (approximately).

For the control relay:

Voltage drop (V) = Current (I) × Resistance (R) of control relay

V_relay