To calculate the resistance of a resistor, you can use the formula R = V^2 / P, where R is the resistance in ohms, V is the voltage in volts, and P is the power in watts. In this case, the power is 60W and the voltage is 120V, so the resistance would be (120V)^2 / 60W = 240 ohms.
The relationship between resistance and power in a circuit is described by Ohm's Law, which states that the current in a circuit is directly proportional to the voltage and inversely proportional to the resistance. This means that as resistance increases, power decreases, and vice versa.
Yes, there are other formulas you can use to calculate resistance in a circuit. One alternative is R = V / I, where R is resistance, V is voltage, and I is current. In this case, you would need to know the current flowing through the circuit in order to use this formula.
The wattage of a lamp does not directly affect the resistance of a circuit. However, the wattage does affect the amount of power being used in the circuit, which can indirectly impact the resistance. In general, higher wattage lamps will require a lower resistance in order to maintain a safe level of power in the circuit.
Yes, there is a limit to the resistance that a circuit can have. In theory, the resistance could be infinitely high, but in practical terms, it is limited by the breakdown voltage of the components in the circuit. If the resistance is too high, it may cause the components to fail or the circuit to stop functioning properly.