Home / Online Test / Liquid Crystal Displays Objective Questions Online Test Liquid Crystal Displays Objective Questions S Bharadwaj ReddyLeave a comment Liquid Crystal Displays Objective Questions Digital Electronics Objective Questions 0% LCDs operate from a voltage ranges from 10 to 15V 3 to 15V 10V 5V Correct! Wrong! - Continue >> In 7 segment display, how many LEDs are used? 9 10 8 7 Correct! Wrong! - Continue >> By which properties, the orientation of molecules in a layer of liquid crystals can be changed? None of the Mentioned Magnetic field Electromagnetic field Electric field Correct! Wrong! - Continue >> LCDs operate from a frequency ranges from 30Hz to 60Hz 10Hz to 60Hz 50Hz to 70Hz None of the Mentioned Correct! Wrong! - Continue >> What is backplane in LCD? The ac voltage applied between segment and a common element The dc voltage applied between segment and a common element None of the Mentioned The amount of power consumed Correct! Wrong! - Continue >> The direction of electric field in a LCD is determined by Molecular Orbital Theory the molecule’s chemical structure None of the Mentioned Crystalline surface structure Correct! Wrong! - Continue >> The optical properties of liquid crystals depend on the direction of Air Water Light Solid Correct! Wrong! - Continue >> The full form of LCD is Logical Crystal Display Liquid Crystalline Display Liquid Crystal Display Logical Crystalline Display Correct! Wrong! - Continue >> The first LCDs became commercially available in 1960s 1980s 1950s None of the Mentioned Correct! Wrong! - Continue >> Electro-optical effect is produced in LED OFC LCD None of the Mentioned Correct! Wrong! - Continue >> Share the quiz to show your results ! Facebook Facebook Just tell us who you are to view your results ! Show my results >> Liquid Crystal Displays I got %%score%% of %%total%% right Share your results Facebook Facebook Twitter Google+ ↺ PLAY AGAIN ! Previous Post:Demultiplexers Objective Questions – Part 2Next Post:Encoders Objective Questions Related Articles Online Test Digital Readout Systems Objective Questions March 17, 2017 Online Test Transformer Open Circuit and Short Circuit Test January 2, 2015 Online Test Power Factor Control of Three Phase Induction Motors January 2, 2015 Online Test Memory Devices Objective Questions – Part 4 May 1, 2015 Online Test Three-Phase Rectifiers Questions and Answers – Part 1 December 1, 2014 Online Test Control Systems Objective Questions & Answers – Set 5 May 19, 2017 Online Test Heat Flow Balance Systems Objective Questions February 21, 2017 Online Test Power Systems Objective Questions & Answers – Set 3 January 3, 2015 Online Test Power Angle Characteristics of Synchronous Machines January 2, 2015 Online Test Synchronous Motor Phasor Diagram January 2, 2015 Online Test Self Balancing Potentiometer Objective Questions February 17, 2017 Online Test Speed Control of DC Motors January 2, 2015 Also Read : PWM Inverters Objective Questions – 4 December 1, 2014 Rotating Amplifiers : DC Generators January 2, 2015 Principle of Energy Conversion January 2, 2015 Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.