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With the help of a circuit diagram describe the experiment to study the characteristics of the photoelectric effect. Hence discuss any 2 characteristics of the photoelectric effect.
Concept: The Photoelectric Effect
Is it always necessary to use red light to get a photoelectric effect?
Concept: The Photoelectric Effect
Explain de-Broglie wavelength.
Concept: De Broglie Hypothesis
Obtain an expression for de-Broglie wavelength of wave associated with material particles. The photoelectric work function for metal is 4.2 eV. Find the threshold wavelength.
Concept: De Broglie Hypothesis
If the maximum kinetic energy of emitted electrons in the photoelectric effect is 2eV, the stopping potential will be ______.
Concept: The Photoelectric Effect
An electron is accelerated through a potential difference of 100 volts. Calculate de-Broglie wavelength in nm.
Concept: De Broglie Hypothesis
To convert a moving coil galvanometer into an ammeter we need to connect a ______.
Concept: Moving Coil Galvanometer
In a photoelectric experiment, the stopping potential is 1.5V. What is the maximum kinetic energy of a photoelectron?
Concept: The Photoelectric Effect
Distinguish between ‘paramagnetic’ and ‘ferromagnetic’ substances.
Concept: Magnetic Properties of Materials
The decay constant of radioactive substance is 4.33 x 10-4 per year. Calculate its half life period.
Concept: Law of Radioactive Decay
Linear momentum of an electron in Bohr orbit of H-atom (principal quantum number n) is proportional to ______.
Concept: Bohr’s Atomic Model
A circular coil of 300 turns and average area 5 * 10-3m2 carries a current of 15A. Calculate the magnitude of magnetic moment associated with the coil.
Concept: Magnetic Dipole Moment of a Revolving Electron
Which of the following substances is ductile?
Concept: Magnetic Properties of Materials
Give any ‘two’ points of differences between diamagnetic and ferromagnetic substances.
Concept: Magnetic Properties of Materials
In a hydrogen atom, an electron carrying charge 'e' revolves in an orbit of radius 'r' with speed 'v'. Obtain an expression for the magnitude of magnetic moment of a revolving electron.
Concept: Current Loop as a Magnetic Dipole: Magnetic Dipole Moment of Current Loop
The magnetic moment of a magnet of dimensions 5 cm × 2.5 cm × 1.25 cm is 3 Am2. Calculate the intensity of magnetization.
Concept: Magnetisation and Magnetic Intensity
Derive an expression for the total energy of electron in ‘n' th Bohr orbit. Hence show that energy of the electron is inversely proportional to the square of principal quantum number. Also define binding energy.
Concept: Mass-energy and Nuclear Binding Energy >> Nuclear Binding Energy
The susceptibility of magnesium at 200 K is 1.8 x 10-5. At what temperature will the susceptibility decrease by 6 x 10-6?
Concept: Magnetic Properties of Materials
Show that the orbital magnetic dipole moment of a revolving electron is `(eVr)/2`
Concept: Magnetic Dipole Moment of a Revolving Electron
An electron in an atom revolves around the nucleus in an orbit of radius 0.53 Å. If the frequency of revolution of an electron is 9 x109 MHz, calculate the orbital angular momentum
[Given : Charge on an electron = 1.6 x 10–19 C; Gyromagnetic ratio = 8.8 x 1010 C/kg; π = 3.142]
Concept: Magnetic Dipole Moment of a Revolving Electron
