E1-E2?gneill said:
No. E2 is not connected to point T.Janiceleong26 said:
I'm confused .. Why isn't E2 connected to T?gneill said:
Because there's the lengths XT and TY of resistive wire between E2 and T. There is some (unknown) current running through those lengths, causing potential differences.Janiceleong26 said:
Okay.. So the p.d. across XT is XT/XY x E1?gneill said:
No. Forget about E1 for now; you don't have a value for it. What you are to assume is that you know E2, and that the galvanometer reading is zero.Janiceleong26 said:
Potential at T is equal to E2gneill said:
Right! Note that it doesn't matter what E1 is. As soon as the galvanometer shows zero current, the potential at point T must match E2.Janiceleong26 said:
Yeah! It's E2 divide by the length XT. Thanks !gneill said:
A potentiometer circuit is an electronic circuit that uses a variable resistor, known as a potentiometer, to control the output voltage. It is commonly used in electronic devices to adjust the volume, brightness, or other parameters.
A potentiometer circuit works by varying the resistance between two terminals of the potentiometer. The input voltage is applied across one end of the potentiometer and the output voltage is taken from the other end. By adjusting the position of the potentiometer's wiper, the resistance between the input and output terminals changes, thus changing the output voltage.
The components of a potentiometer circuit include a potentiometer, a power source, and a load. The potentiometer is the variable resistor that controls the output voltage, the power source provides the input voltage, and the load is the device that is powered by the output voltage.
There are two main types of potentiometer circuits: voltage divider and rheostat. In a voltage divider circuit, the potentiometer is connected in series with other resistors to divide the input voltage. In a rheostat circuit, the potentiometer is used as a variable resistor to control the amount of current flowing through a circuit.
Potentiometer circuits have a wide range of applications in electronics, including volume control in audio systems, dimmer switches for lights, and speed control in motors. They are also used in scientific instruments, such as voltmeters and potentiometric sensors, to measure voltage and resistance.