Resistance of a System of Resistors

If two resistors of $250 \mathrm{\Omega }$ and $150 \mathrm{\Omega }$ are joined together in series and then placed in parallel with a $400 \mathrm{\Omega }$ resistor, the effective resistance of the combination is:

Five identical lamps are connected as shown in the figure. Which of the following statement is true?

The resultant resistance of two resistances $10 \mathrm{\Omega }$ and $15 \mathrm{\Omega }$ connected in series is,

The resistance of a conductor is $27 \mathrm{\Omega }$. If it is cut into three equal parts and connected in parallel, then its total resistance is _____.

Find the equivalent resistance between A & B in the following circuit.

Find the equivalent resistance between A & B in the following circuit.

Find the equivalent resistance between A & B in the following circuit.

Find the equivalent resistance between A & B in the following circuits.

Derive necessary formula for equivalent resistance of a parallel combination of resistances along with proper circuit diagram.

Derive necessary formula for equivalent resistance of a series combination of resistances giving proper circuit diagram.

What is the difference between series combination and parallel combination of resistances?

How electrical combination is made at home?

Resistances of different values are connected in parallel and connected with an electrical source. In each of the resistor

Three conducting wires of $1 \mathrm{\Omega }, 2 \mathrm{\Omega }$ and $3 \mathrm{\Omega }$ are connected in series in an electrical circuit. What will be the equivalent resistance?

Calculate the effective resistance between A and B. Also find the reading of ammeter and voltmeter for part.

Consider the parallel combination of resistors in a circuit. The current doesn't pass through the circuit if one of the branches of the circuit is open.

Let us imagine that there exists a device that melts when a high current flows through it. Now to protect a device from high current, we connect the electrical device in _____ with the device.

Find the minimum equivalent resistance that can be obtained by three resistance $2 \mathrm{\Omega },\hspace{0.17em}3 \mathrm{\Omega }$ and $6 \mathrm{\Omega }$.

Find the minimum equivalent resistance that can be obtained by three resistance $2 \mathrm{\Omega },\hspace{0.17em}3 \mathrm{\Omega }$ and $6 \mathrm{\Omega }$.

Find the minimum equivalent resistance that can be obtained by three resistance $2 \mathrm{\Omega },\hspace{0.17em}3 \mathrm{\Omega }$ and $6 \mathrm{\Omega }$.