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Explain De Broglie’s Hypothesis.
Concept: De Broglie Hypothesis
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
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
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
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
Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm2, if the magnetic moment is 2 Am2.
Concept: Magnetisation and Magnetic Intensity
