Read the following case and answer the following questions given:
During a power cut, Ravi used a torchlight. He noticed a lamp at the front and a switch on the side. When he pushed the switch forward, the lamp glowed. When he moved the switch back, the lamp stopped glowing. Ravi opened the torchlight and found electric cells, wires, and a bulb inside.
What did Ravi find inside the torchlight?