You can find the current by using an ammeter. The cheapest way (although more invasive) is to use a probe type ammeter or multimeter. To use, you need to insert the meter in the current path of the resistor (in series with the resistor). These meters are fairly cheap - as low as $8 if you shop around. If it is not feasible to break the circuit and insert the meter, and you have room around a wire going to the resistor, you could use a clamp on ammeter as well. These are typically more expensive.
If you understand resistor codes, you can also use a volt meter/multimeter to measure the voltage drop across the resistor (put the probe in parallel with the resistor). The current should be equivalent to I = V / R.
If you don't know resistor codes, do an online search to match colors with numbers. There should be three stripes. The first two are the resistance and the third is a magnitude. For example, if the first color matches the number 1, and the second matches 8, and the third matches 3, then this is a 18 x 1000 = 1.8k ohm resistor.
A: If you know the total resistance and total voltage then you know total current flow for the circuit, this current will be same for every resistor in series however the voltage drop will change for each resistor . So measuring the voltage drop across the resistor in question and divide by the total current will give you the resistor value.
A resistor.
Who can tell? The power rating of a resistor simply tells us the maximum power that resistor is capable of handling; it doesn't tell us anything about the actual power being produced for any given current. So, to find out the voltage drop across that resistor, you will need to find out its resistance, and multiply this value by the current you specify.
A series dropping resistor is a resistor that limits the amount of current flow in a circuit.
It depends on where you are going to use this resistor and what its application going to be. If the circuit you are using can tolerate this then you are fine.
if you want to find the current (in amperes) through the resistor then connect a ammeter in series with the resistor.
To find the energy dissipated in a resistor, you can use the formula: Energy (current)2 x resistance x time. This formula calculates the energy dissipated in the resistor based on the current flowing through it, the resistance of the resistor, and the time the current flows.
The power generated in a resistor is converted into heat. and that can be power which is converted into heat is the product of the voltage across the resistor and, current passing through the resistor. or the product of square of the current and the resistance offered by the resistor.
To find the current through the 40 ohm resistor, first calculate the total resistance of the parallel circuit: 1/Rt = 1/120 + 1/60 + 1/40. Then, calculate the total current using Ohm's Law, I = V/Rt. Finally, use the current divider rule to find the current passing through the 40 ohm resistor.
When an electric current flows through a resistor, the resistor resists the flow of the current, causing a decrease in the current. This decrease in current is proportional to the resistance of the resistor, as described by Ohm's Law.
Current flows through a resistor, not across it.
To find the potential difference across a resistor in an electric circuit, you can use Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R). So, you can calculate the potential difference by multiplying the current flowing through the resistor by the resistance value of the resistor.
To calculate the total current in the circuit, you first need to find the total resistance by using the formula for resistors in parallel: 1/Total Resistance = 1/120 + 1/60 + 1/40. Once you have the total resistance, you can use Ohm's Law: Current = Voltage / Total Resistance. Finally, to find the current running through the 40 ohm resistor, you divide the total current by the resistance of the 40 ohm resistor.
It depends on the current going through it. Ohm's law: Voltage equals current times resistance.
A: If you know the total resistance and total voltage then you know total current flow for the circuit, this current will be same for every resistor in series however the voltage drop will change for each resistor . So measuring the voltage drop across the resistor in question and divide by the total current will give you the resistor value.
A resistor.
Who can tell? The power rating of a resistor simply tells us the maximum power that resistor is capable of handling; it doesn't tell us anything about the actual power being produced for any given current. So, to find out the voltage drop across that resistor, you will need to find out its resistance, and multiply this value by the current you specify.