NCERT Exemplar Class 11
In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 × 10^−18J from the radiations of 600 nm, calculate the number of photons received by the detector.
12
Nov
In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 × 10^−18J from the radiations of 600 nm, calculate the number of photons received by the detector. calculate the number of photons received by the detector. In astronomical observations signals observed from the distant [...]
Neon gas is generally used in the sign boards. If it emits strongly at 616nm, calculate a. The frequency of emission, b. The distance travelled by this radiation in 30s c. The energy of quantum and d. The number of quanta present if it produces 2J of energy.
12
Nov
Neon gas is generally used in the sign boards. If it emits strongly at 616nm, calculate a. The frequency of emission, b. The distance travelled by this radiation in 30s c. The energy of quantum and d. The number of quanta present if it produces 2J of energy. b. The distance travelled by this radiation [...]
Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If the number of photons emitted is 5.6×10^24. calculate the power of this laser.
12
Nov
Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If the number of photons emitted is 5.6×10^24. calculate the power of this laser. Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If the number of photons emitted is 5.6×10^24. calculate the power of this laser. November 12, 2020 Category: Chapter [...]
An ion with mass number 37 possesses one unit off negative charge. If the ion contains 11.1% more neutrons than electrons, find the symbol of the ion.
12
Nov
An ion with mass number 37 possesses one unit off negative charge. If the ion contains 11.1% more neutrons than electrons, find the symbol of the ion. An ion with mass number 37 possesses one unit off negative charge. If the ion contains 11.1% more neutrons than electrons find the symbol of the ion. November [...]
An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.
12
Nov
An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol. An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
A certain particle carries 2.5×10^−16C of static electric charge. Calculate the number of electrons present in it.
12
Nov
A certain particle carries 2.5×10^−16C of static electric charge. Calculate the number of electrons present in it. A certain particle carries 2.5×10^−16C of static electric charge. Calculate the number of electrons present in it. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
The cylindrical tube of a spray pump has a cross-section of 8.0 cm^2 one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.5 m min^−1 , what is the speed of ejection of the liquid through the holes ?
12
Nov
The cylindrical tube of a spray pump has a cross-section of 8.0 cm^2 one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.5 m min^−1 , what is the speed of ejection of the liquid through the holes ? The cylindrical tube of [...]
The diameter of zinc atom is 2.6Å. Calculate (a) radius of zinc atom in pm and (b) number of atoms present in a length of 1.6 cm if the atoms are arranged side by side lengthwise.
12
Nov
The diameter of zinc atom is 2.6Å. Calculate (a) radius of zinc atom in pm and (b) number of atoms present in a length of 1.6 cm if the atoms are arranged side by side lengthwise. The diameter of zinc atom is 2.6Å. Calculate (a) radius of zinc atom in pm and (b) number of [...]
2×10^8 atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 3.0 cm.
12
Nov
2×10^8 atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 3.0 cm. 2×10^8 atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 3.0 cm. November 12, 2020 Category: Chapter 2 - [...]
If the diameter of a carbon atom is 0.15 nm, calculate the number of carbon atoms which can be placed side by side in a straight line across the length of scale of length 20 cm long.
12
Nov
If the diameter of a carbon atom is 0.15 nm, calculate the number of carbon atoms which can be placed side by side in a straight line across the length of scale of length 20 cm long. calculate the number of carbon atoms which can be placed side by side in a straight line across [...]