Table of Contents
What does wattage mean on resistor?
Wattage means how much power the physical resistor is rated to handle. The rating is always for given conditions, such as the ambient temperature, or when mounted on a heat sink. You determine the power in a resistor by computing the voltage across times the current thru it.
How many volts can a 1 watt resistor handle?
Small 1/4W and 1/2W resistors are usually rated about 200v.
Can I use 1W resistor instead of 1 4W?
Yes, but conservative designs usually derate dissipation for increased reliability.
How can you tell the resistance of a resistor?
The R stands for resistance, the V stands for voltage, and the I stands for current. Your units are ohms for resistance, volts for voltage, and amps for current. This formula tells you that your resistance is always equal to your voltage divided by the current.
How do you find the voltage across A resistor in series?
Ohm’s Law states that V=I*R, where V is voltage, I is current and R is resistance. In a series circuit, the voltage drop across each resistor will be directly proportional to the size of the resistor. In a parallel circuit, the voltage drop across each resistor will be the same as the power source.
How do you find the voltage across A resistor in A combination circuit?
The Ohm’s law equation (ΔV = I • R) can be used to determine the voltage drop across each resistor.
How can I determine resistor voltage?
Part 3 of 3: Calculating Voltage across a Resistor (Parallel Circuit) Understand parallel circuits. Imagine a wire leaving one end of a battery, then splitting into two separate wires. Think about how the current flows. In a parallel circuit, the current flows across each path available to it. Use the total voltage to find the voltage across each resistor. Calculate the total current of the circuit.
How to calculate voltage at a specific resistor?
Part 2 of 3: Calculating Voltage across a Resistor (Series Circuit) Understand a series circuit. A series circuit is easy to identify. Calculate the total resistance. Add together all resistance values on the circuit. Find the current. Use Ohm’s Law to find the current of the entire circuit. Adjust Ohm’s Law to solve for voltage. Calculate the voltage across each resistor. Check your answer.
What does the wattage mean on a resistor?
Wattage means how much power the physical resistor is rated to handle. The rating is always for given conditions, such as the ambient temperature, or when mounted on a heat sink. You determine the power in a resistor by computing the voltage across times the current thru it.
How do you determine the value of a resistor?
Steps Position the resistor with the gold or silver color band to the right.. Read the color sequence that must be decoded to determine resistance. Determine the coded number for the resistive value. Determine the tolerance of the resistor. Determine the decoded number for the resistive value.