NCERT Exemplar Class 11
Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency (v0) and work function (W0) of the metal.
12
Nov
Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency (v0) and work function (W0) of the metal. Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold [...]
A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second .
12
Nov
A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second . A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second . November 12, 2020 Category: Chapter 2 - Atomic Structure [...]
An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1.
12
Nov
An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1. An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1. November 12, 2020 Category: Chapter 2 - [...]
A vertical off-shore structure is built to withstand a maximum stress of 10^9 Pa. Is the structure suitable for putting up on top of an oil well in the ocean ? Take the depth of the ocean to be roughly 3 km, and ignore ocean currents.
12
Nov
A vertical off-shore structure is built to withstand a maximum stress of 10^9 Pa. Is the structure suitable for putting up on top of an oil well in the ocean ? Take the depth of the ocean to be roughly 3 km, and ignore ocean currents. 2 loops 3 loops and 4 loops Show that [...]
Torricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984kgm^−3. Determine the height of the wine column for normal atmospheric pressure.
12
Nov
Torricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984kgm^−3. Determine the height of the wine column for normal atmospheric pressure. Torricelli's barometer used mercury. Pascal duplicated it using French wine of density 984kgm^−3. Determine the height of the wine column for normal atmospheric pressure. November 12, 2020 Category: Chapter 14 - [...]
A 50kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0cm. What is the pressure exerted by the heel on the horizontal floor ?
12
Nov
A 50kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0cm. What is the pressure exerted by the heel on the horizontal floor ? A 50kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0cm. What is [...]
Show that when a string fixed at its two ends vibrates in 1 loop, 2 loops, 3 loops and 4 loops, the frequencies are in the ratio 1 : 2 : 3 : 4.
12
Nov
Show that when a string fixed at its two ends vibrates in 1 loop, 2 loops, 3 loops and 4 loops, the frequencies are in the ratio 1 : 2 : 3 : 4. 2 loops 3 loops and 4 loops Show that when a string fixed at its two ends vibrates in 1 loop [...]
A photon of wavelength 4×10^−7m strikes on metal surface , the work function of the metal being 2.13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy of the emission and the velocity of the photoelectron (1eV=1,6020×10^−19J),
12
Nov
A photon of wavelength 4×10^−7m strikes on metal surface , the work function of the metal being 2.13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy of the emission and the velocity of the photoelectron (1eV=1,6020×10^−19J), 6020×10^−19J) A photon of wavelength 4×10^−7m strikes on metal surface the work function [...]
What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ?
12
Nov
What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ? What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ? November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
Calculate the wavelength, frequency, and wave number of a light wave whose period is 2.0×10^−10s.
12
Nov
Calculate the wavelength, frequency, and wave number of a light wave whose period is 2.0×10^−10s. and wave number of a light wave whose period is 2.0×10^−10s. Calculate the wavelength frequency November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,