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An electron is accelerated through a potential of 120 V. Find its de Broglie wavelength.
Concept: De Broglie Hypothesis
State Einstein photoelectric equation.
Concept: The Photoelectric Effect
What is the photoelectric effect? Define stopping potential and photoelectric work function.
Concept: The Photoelectric Effect
Calculate De Broglie's wavelength of the bullet moving with speed 90m/sec and having a mass of 5 gm.
Concept: De Broglie Hypothesis
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
