Free gk questions Online Test - MeritNotes

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1. The bending of waves around the edges of an obstacle is called

2. The spectra that depends only on the temperature of the source is _____ spectrum.

3. When a coil is rotated in magnetic field, induced current is generated in the coil. This principle is used in making

4. Type of signaling used in electronic exchange is

5. The two elements that are frequently used for making transistors are

6. Polarisation of light waves proves that the light waves are ______ waves.

7. Among the various allotropes of carbon

8. In Fresnel diffraction, source and screen are

9. For total internal reflection to take place light must travel from _____ the critical angle.

(a) Denser to rarer medium and angle of incidence inside the denser medium must be less than
(b) Rarer to denser medium and angle of incidence inside the denser medium must e equal to
(c) Rarer to denser medium and angle of incidence inside the denser medium must be greater than
(d) Denser to rarer medium and angle of incidence inside the denser medium must be greater than

10. An ant can see the object all round it due to the presence of

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