The variable resistor (rheostat) is a device to control the size of the current by adjusting the resistance on the variable resistor ....

Refer to the video below for the setting up of the apparatus. Why do you need a variable resistor (rheostat)? Without the variable...

Resistors may be connected in series or parallel. When asked which resistor has higher power (hence higher energy), in general we will...

Resistors may be connected in series or parallel. When asked which resistor has higher power (hence higher energy), in general we will...

As both the fixed resistor and the thermistor are connected in series, the sum of potential difference across them will be equal to the...

Solutions: Option B Whatever that goes in has to come out. With this basic concept, you will be able to solve this question easily....

Sensitivity of the ammeter means that how small a current the ammeter can measure. Example, if the original set up is 0.2 A per division,...

Based on individual calculations, the highest effective resistance will only be achieved if the junctions are connected at Q and S.