Describe one technique you could use to measure the threshold voltage for LEDs.
A sensitive ammeter is placed in series with LED. With the increase in Voltage, measure the potential difference value when it starts conducting. Black-out and shaded vision tube is used to observe the voltage value when visible light is first observed as the voltage is increased.
MP
Related Physics A Level answers
All answers ▸The electric potential energy of two protons is 1.0MeV. Calculate their separation
What is the main evidence for the Big Bang theory?
How do I find the half-life of radioactive isotope?
How does the strong nuclear force between two nucleons varies with separation of the nucleons. Please detail the range over which the force acts.