Photoelectric Effect MCQs with Answers

Photoelectric Effect – Definition A process in which any metal emits electrons due to the light is called photoelectric effect. Photo emission cell, Photo junction diode and Photo voltaic cell works on the principle of photoelectric effect. Threshold frequency used to start the emission of electrons from any metal. The emitted electrons are called photons. All…

MCQs on Voltage Questions and Answers

Voltage – Definition Voltage is an electrical pressure or potential difference which help to flow the current. Voltmeter is used to measure the voltage in any circuit. The SI unit of voltage is volt. Voltage can be alternating (AC) or direct (DC). The symbol of voltage is V or E. The term voltage introduced by…

MCQs on History of Electricity

History of Electricity – Definition William Gilbert was the first person discovered electricity. Stephen Gray has discovered the medium (materials) from which electricity can pass or not. Benjamin Franklin has discovered the positive and negative charges. Alessandro Volta had made the first battery. Charles Augustin discovered the laws of attraction and repulsion. All the MCQs…