Question 10

During an experiment, light of different frequencies is radiated onto a silver cathode of  a photocell and the corresponding maximum speed of the ejected photoelectrons are measured. A graph of the energy of the incident photons versus the square of the maximum speed of the ejected photoelectrons is shown below. 10.1 Define the term photoelectric … Read more

Question 8

In the circuit diagram below, resistor R,with a resistance of 5,6 Ω, is connected,   together with a switch, an ammeter and a high-resistance voltmeter, to a battery with an unknown internal resistance, r. The resistance of the connecting wires and the ammeter may be ignored. The graph below shows the potential difference across the terminals … Read more