What is the voltage across the 100 ohm resistor?

According to Ohm’s law, if 10 milliamperes passes through a 100 ohm resistor, then the voltage dropped across that resistor will be : E=IR=10mA×100Ω=1 volt. So, if you started with 5 volts, that means the remaining 4 volts will be dropped across the LED.

How do you find the resistance of an unknown resistor in a series circuit?

Calculating Resistance of Unknown resistor, total current and voltage across each resistor

1. – Resistance of R2. Since it is given that total power is 60 watts, and the series circuit has 120v, then we can calculate total resistance to be RT = (120*120)/60 = 240 ohms.
2. – Current in the circuit.
3. – Voltage across each resistor.

What is the voltage drop across the 10 ohm resistor?

If the voltage drop across the 10-ohm resistor is 15V, what is the total voltage, current, and resistance? They’re in series. 15 volts across 10 ohm is 1.5 Volts per ohm. 22.5 times 1.5 = 22.5 + 11.25 = 33.75 Volts.

What is the unknown resistance?

Your unknown resistance is . between D and B points denote voltage drop across a Galvanometer. Now, change R2 variable resistor and tune it until the Galvanometer shows zero deflection. Once the Galvanometer shows zero deflection, the value of R2 is noted and hence unknown resistance can be known by using the formula.

What is the formula of unknown resistance?

Each time you can calculate the unknown resistance using the formula:unknown resistance(a)=known resistance(b)*L/M. The value is found to be the same for all values of known resistance.

When resistors are connected in series the potential difference across each is the same?

The potential difference across each resistor is the same, and the currents add to equal the total current entering (and leaving) the parallel combination.

What is the voltage across the resistor?

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.