Cengage JEE Mains Physics by B.M Sharma
Light of wavelength 0.6μm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4μm from a mercury vapor lamp, the stopping potential is 1.5 V. Then, the work function [in electron volts] of the photocell surface is
04
Jun
Light of wavelength 0.6μm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4μm from a mercury vapor lamp, the stopping potential is 1.5 V. Then, the work function [in electron volts] of the photocell surface is A [...]
Ultraviolet light of wavelength 300 nm and intensity 1.0 W m^-2 falls on the surface of a photosensitive material. If one per cent of the incident photons produce photoelectrons, then the number of photoelectrons emitted per second from an area of 1.0 cm^2 of the surface is nearly.
04
Jun
Ultraviolet light of wavelength 300 nm and intensity 1.0 W m^-2 falls on the surface of a photosensitive material. If one per cent of the incident photons produce photoelectrons, then the number of photoelectrons emitted per second from an area of 1.0 cm^2 of the surface is nearly. then the number of photoelectrons emitted per [...]
A particle of mass 10^−31 kg is moving with a velocity equal to 10^5ms^−1. The wavelength of the particle is equal to:
04
Jun
A particle of mass 10^−31 kg is moving with a velocity equal to 10^5ms^−1. The wavelength of the particle is equal to: A particle of mass 10^−31 kg is moving with a velocity equal to 10^5ms^−1. The wavelength of the particle is equal to: June 4, 2021 Category: Cengage JEE Mains Physics by B.M Sharma [...]
In Young’s double-slit experiment the separation between two coherent sources S1 and S2 is d and the distance between the source and screen is D. In the interference pattern, it is found that exactly in front of one slit, there occurs a minimum. Then the possible wavelengths used in the experiment are
06
Dec
In Young’s double-slit experiment the separation between two coherent sources S1 and S2 is d and the distance between the source and screen is D. In the interference pattern, it is found that exactly in front of one slit, there occurs a minimum. Then the possible wavelengths used in the experiment are In Young's double-slit [...]
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In Young's double-slit experiment the separation between two coherent sources S1 and S2 is d and the distance between the source and screen is D. In the interference pattern ,
it is found that exactly in front of one slit ,
there occurs a minimum. Then the possible wavelengths used in the experiment are ,
Figure shows three similar lamps L1 , L2 , and L3 connected across a power supply. If the lamp L3 fuses, how will the light emitted by L1 and L2 change?
06
Dec
Figure shows three similar lamps L1 , L2 , and L3 connected across a power supply. If the lamp L3 fuses, how will the light emitted by L1 and L2 change? and L3 connected across a power supply. If the lamp L3 fuses Figure shows three similar lamps L1 how will the light emitted by [...]
Two identical heaters rated 220 volt, 1000 watt are placed in series with each other across 220 volt lines , then the combined power is
06
Dec
Two identical heaters rated 220 volt, 1000 watt are placed in series with each other across 220 volt lines , then the combined power is 1000 watt are placed in series with each other across 220 volt lines then the combined power is Two identical heaters rated 220 volt December 6, 2020 Category: Cengage JEE [...]
A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in series across a 220 V line; which electric bulb will glow more brightly?
06
Dec
A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in series across a 220 V line; which electric bulb will glow more brightly? 220 V bulb and a 100 W 220 V bulb are connected in series across a 220 V line; which electric bulb will glow more brightly [...]
Two electric bulbs A and B are rated 60 and 100W, respectively. If they are connected in parallel to the same source , then
06
Dec
Two electric bulbs A and B are rated 60 and 100W, respectively. If they are connected in parallel to the same source , then respectively . If they are connected in parallel to the same source then Two electric bulbs A and B are rated 60 and 100W December 6, 2020 Category: Cengage JEE Mains [...]
The three resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation.
06
Dec
The three resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation. The three resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation. December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma [...]
Four resistances carrying a current shown in figure are immersed in a box containing ice at 0^∘C. How much ice must be put in the box every 10 min to keep the average quantity of ice in the box constant? Latent heat of ice is 80calg^−1 .
06
Dec
Four resistances carrying a current shown in figure are immersed in a box containing ice at 0^∘C. How much ice must be put in the box every 10 min to keep the average quantity of ice in the box constant? Latent heat of ice is 80calg^−1 . All bulbs in the circuit shown in figure [...]