MCQ
LCD stands for:
  • A
    Light Carrying Diode
  • B
    Liquid Crystal Display
  • C
    Long Crystal Display
  • D
    Light Crystal Display

Answer

  1. Liquid Crystal Display

    Explanation:

    LCD stands for "Liquid Crystal Display".

LCD is a special thin flat panel that can let light go through it, or can block the light. (Unlike an LED it does not produce its own light).

The panel is made up of several blocks, and each block can be in any shape. Each block is filled with liquid crystals that can be made clear or solid, by changing the electric current to that block.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Half-life of a radioactive substance is 20 minutes. Difference between points of time when it is 33% disintegrated and 67% disintegrated is approximately

(a) 10 min

(b) 20 min

(c) 30 min

(d) 40 min

Assertion :   Magnetic field interacts with a moving charge and not with a stationary charge.

Reason    : A moving charge produces a magnetic field.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

The given truth table is of

(a) OR gate

(b) AND gate

(c) NOT gate

(d) None of above

Which of the following pairs has quantities of the same dimensions?
  1. Magnetic field B and magnetizing field intensity H.
  2. Magnetic field B and intensity of magnetization I.
  3. Magnetizing field intensity H and intensity of magnetization I.
  4. Longitudinal strain and magnetic susceptibility.
In which of the following series, does the 121.5nm line of the spectrum of the hydrogen atom lie?

Positive rays consists of

(a) Electrons

(b) Neutrons

(c) Positive ions

(d) Electro magnetic waves

Assertion  :  If a charged particle is moving on a circular path in a perpendicular magnetic field, the momentum of the particle is not changing,.

Reason     : Velocity of the particle in not changing in the magnetic field.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be

(a)   

(b)  

(c) 2  

(d)

When a ray of light passes from a denser to a rarer medium, some part of it gets ....... into the denser medium:

What type of diffraction takes place in case of Young's double slit experiment?