Question

If you connect a resistor to a battery with a given emf, the measured terminal voltage is V. Next you connect in parallel another resistor to the first one. As a result,

1. The terminal voltage increases;
2. The terminal voltage decreases;
3. The terminal voltage depends only on the internal resistance of the battery and doesn’t depend on a load.

Answer 1

The measured terminal voltage is equal to E - IR

where

E = emf

I = current drawn from the battery

R = internal resistance of the battery.

When another resistor is connected across the load, the equivalent resistance decreases. This will increase the current drawn from the battery. Which will also increase the voltage drop across the internal resistance of the battery. Therefore, the measured terminal voltage (E - IR) decreases.

Therefore, the correct option will be option B.

Thank You !!!