Part 2
A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. The value of v is (mass of hydrogen atom =1.67×10^−27 kg)
17
Jun
A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. The value of v is (mass of hydrogen atom =1.67×10^−27 kg) A hydrogen atom moving at a speed v absorbs a photon of wavelength 122 nm and stops. The value of v is (mass of hydrogen atom =1.67×10^−27 [...]
The energy of a photon in eV of wavelength lamba nm will be
17
Jun
The energy of a photon in eV of wavelength lamba nm will be The energy of a photon in eV of wavelength lamba nm will be June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 11 - Photoelectric Effect , Part 2 ,
Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased,
17
Jun
Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased, Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 11 - Photoelectric Effect , Part 2 ,
If 5% of the energy supplied to a bulb is irradiated as visible light, how many quanta are emitted per second by a 100 W lamp? Assume wavelength of visible light as 5.6×10^−5 cm.
17
Jun
If 5% of the energy supplied to a bulb is irradiated as visible light, how many quanta are emitted per second by a 100 W lamp? Assume wavelength of visible light as 5.6×10^−5 cm. how many quanta are emitted per second by a 100 W lamp? Assume wavelength of visible light as 5.6×10^−5 cm. If [...]
The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is
17
Jun
The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time [...]
The half-life period of a radioactive element x is same as the mean life time of another radioactive element y. Initially, both of them have the same number of atoms. Then, (a) x and y have the same decay rate initially (b) x and y decay at the same rate always (c) y will decay at a faster rate than x (d) x will decay at a faster rate than y
17
Jun
The half-life period of a radioactive element x is same as the mean life time of another radioactive element y. Initially, both of them have the same number of atoms. Then, (a) x and y have the same decay rate initially (b) x and y decay at the same rate always (c) y will decay [...]
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(a) x and y have the same decay rate initially (b) x and y decay at the same rate always (c) y will decay at a faster rate than x (d) x will decay at a faster rate than y ,
both of them have the same number of atoms. Then ,
The half-life period of a radioactive element x is same as the mean life time of another radioactive element y. Initially ,
A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be.
17
Jun
A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be. A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be. June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 14 - Nuclear Physics and Radioactivity , Part 2 ,
The count rate from 100cm^3 of a radioactive liquid is c. Some of this liquid is now discarded. The count rate of the remaining liquid is found to be c/10 after three half-lives. The volume of the remaining liquid, in cm^3, is
17
Jun
The count rate from 100cm^3 of a radioactive liquid is c. Some of this liquid is now discarded. The count rate of the remaining liquid is found to be c/10 after three half-lives. The volume of the remaining liquid, in cm^3, is 90% of the active nuclei present in a radioactive sample are found to [...]
A radioactive isotope X with a half-life of 1.37×10^9 years decays to Y which is stable. A sample of rock from the moon was found to contain both the elements X and Y which were in the ratio of 1:7. The age of the rock is.
17
Jun
A radioactive isotope X with a half-life of 1.37×10^9 years decays to Y which is stable. A sample of rock from the moon was found to contain both the elements X and Y which were in the ratio of 1:7. The age of the rock is. 90% of the active nuclei present in a radioactive [...]
Two radioactive substances A and B have half lives of T and 2T respectively. Samples of a and b contain equal number of nuclei initially. After a time 4T, the ratio of the number of undecayed nuclei of A to the number if undecayed nuclei of A to the number of undeacyed nuclei of B is
17
Jun
Two radioactive substances A and B have half lives of T and 2T respectively. Samples of a and b contain equal number of nuclei initially. After a time 4T, the ratio of the number of undecayed nuclei of A to the number if undecayed nuclei of A to the number of undeacyed nuclei of B [...]