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  • General Knowledge Practice Science & Technology Study Material

Digitization help student to explore and study their academic courses online, as this gives them flexibility and scheduling their learning at their convenience. Kidsfront has prepared unique course material of Science & Technology Astronomy for General Knowledge Practice student. This free online Science & Technology study material for General Knowledge Practice will help students in learning and doing practice on Astronomy topic of General Knowledge Practice Science & Technology. The study material on Astronomy, help General Knowledge Practice Science & Technology students to learn every aspect of Astronomy and prepare themselves for exams by doing online test exercise for Astronomy, as their study progresses in class. Kidsfront provide unique pattern of learning Science & Technology with free online comprehensive study material and loads of General Knowledge Practice Science & Technology Astronomy exercise prepared by the highly professionals team. Students can understand Astronomy concept easily and consolidate their learning by doing practice test on Astronomy regularly till they excel in Science & Technology Astronomy.

The intrinsic semiconductor becomes an insulator at

a) 0 degree celcuis
b) 100 degree celcuis
c) 0 K
d) 300 k

Correct Answer Is : 0 K
Solution Is :
If a wire is stretched to make its 0.1% longer ,its resistance will

a) Decrease by 0.2 %
b) Decrease by 0.05%
c) Increase by 0.05%
d) Increase by 0.2%

Correct Answer Is : Increase by 0.2%
Solution Is :
Hole is a:-

a) An antiparticle of electorn.
b) An artifically created particle.
c) Absence of free electrons.
d) A vacancy created when an electron leaves a covalent bond.

Correct Answer Is : A vacancy created when an electron leaves a covalent bond.
Solution Is :
In the communication systems,AM is used for broadcasting because

a) Its is use avoids receiver complexity.
b) Its is more noise immune than other modulation system.
c) Its requie less transmitting power.
d) Do other modulation system can give the necessary bandwidth for faithful transmission.

Correct Answer Is : Its is use avoids receiver complexity.
Solution Is :
A speech signal of 3 KHz is used to modulate a carrier signal of frequency 1 MHz, using amplitude modulation.The frequency of the side bands will be

a) 1.003 Mhz and 0.997 Mhz
b) 1003 Khz and 1000KHz
c) 3001 KHz and 2997 KHz
d) 1 MHz and 0.997 MHz

Correct Answer Is : 1.003 Mhz and 0.997 Mhz
Solution Is :
The maximum peak to peak voltage of an AM wave is 24 mV and the minimum peak to peak voltage is 8mV.The modulation index is.

a) 10%
b) 20%
c) 25%
d) 50%

Correct Answer Is : 50%
Solution Is :
Heavy stable nuclei have more neutrons than protons.This is because of the

a) Neutorns are heavier than protons .
b) Electrostatic force between protons are repulsive.
c) Neturons decay into protons through beta decay.
d) Nuclear forces between neturons are weaker than that between protons.

Correct Answer Is : Electrostatic force between protons are repulsive.
Solution Is :
The ground state energy of hyrogen atom is -13.6eV.What is the potential energy of the electorn in this state?

a) 0 eV
b) (-27.2) eV
c) (-6.8) eV
d) None of these

Correct Answer Is : (-27.2) eV
Solution Is :
If an electron and a photon propagate in the form of waves having the same wavelength,it implies that they have the same

a) Energy
b) Momentum
c) Angular momentum
d) Velocity

Correct Answer Is : Momentum
Solution Is :
When a compact disc is illusminated by a source of white light,coloured lanes are observed.This due to

a) Dispersion
b) Diffraction
c) Interference
d) Refraction

Correct Answer Is : Diffraction
Solution Is :

Preparation for Exams