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
Answered by Milan P. Physics tutor

7094 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

An electron is emitted from a cathode in an electron gun, with a potential difference of 150kV. Find the velocity of the electron after it is accelerated and find the De Broglie wavelength.


A 1.6m long string fixed at both ends vibrates at its fundamental frequency... (i)what is this frequency?


What is the difference between a scalar and a vector quantity?


What is Olbers' Paradox?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences