Question:
The conversion of light energy into electrical energy is achieved in a:
The conversion of light energy into electrical energy is achieved in a:
Show Hint
Photo cells, or photovoltaic cells, convert light energy into electrical energy by utilizing the photoelectric effect.
Updated On: Feb 3, 2026
- Coolidge tube
- Thermocouple
- Photo cell
- Cloud chamber
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the photoelectric effect and photo cells.
A photo cell, also known as a photovoltaic cell, works on the principle of the photoelectric effect. When light strikes a metal surface in the cell, the energy of the photons causes the emission of electrons. These emitted electrons create an electric current, effectively converting light energy into electrical energy. This process is the basis of solar panels, which use the photoelectric effect to generate electricity from sunlight.
Step 2: The working principle of other devices.
- A Coolidge tube is used to generate X-rays, and it doesn't directly convert light energy to electrical energy.
- A thermocouple generates an electrical current due to temperature differences, not light.
- A cloud chamber is used to detect the paths of charged particles, and it does not convert light energy into electrical energy.
Step 3: Conclusion.
Thus, the correct device that converts light energy into electrical energy is a photo cell, corresponding to option (C).
A photo cell, also known as a photovoltaic cell, works on the principle of the photoelectric effect. When light strikes a metal surface in the cell, the energy of the photons causes the emission of electrons. These emitted electrons create an electric current, effectively converting light energy into electrical energy. This process is the basis of solar panels, which use the photoelectric effect to generate electricity from sunlight.
Step 2: The working principle of other devices.
- A Coolidge tube is used to generate X-rays, and it doesn't directly convert light energy to electrical energy.
- A thermocouple generates an electrical current due to temperature differences, not light.
- A cloud chamber is used to detect the paths of charged particles, and it does not convert light energy into electrical energy.
Step 3: Conclusion.
Thus, the correct device that converts light energy into electrical energy is a photo cell, corresponding to option (C).
Was this answer helpful?
0
0
Top Questions on Photoelectric Effect
- Define threshold wavelength and frequency.
- PSEB XII - 2025
- Physics
- Photoelectric Effect
- The maximum kinetic energy of the photoelectrons depends only on:
- PSEB XII - 2025
- Physics
- Photoelectric Effect
- In a series combination of capacitors connected across a battery
- CUET (UG) - 2025
- Physics
- Photoelectric Effect
- The stopping potential for photoelectric emission from a metal surface is 2 V when light of wavelength 400 nm is incident. What will be the stopping potential for light of wavelength 300 nm? (Planck’s constant \( h = 6.63 \times 10^{-34} \) Js, speed of light \( c = 3 \times 10^8 \) m/s, charge of electron \( e = 1.6 \times 10^{-19} \) C)
- CUET (UG) - 2025
- Physics
- Photoelectric Effect
- The work function of a metal 3eV. The colour of the visible light that is required to cause emission of photo electrons is:
- JEE Main - 2025
- Physics
- Photoelectric Effect
View More Questions
Questions Asked in PSEB exam
- Derive an expression for the capacitance of a parallel plate capacitor with a dielectric slab between the plates.
- PSEB XII - 2025
- Electric and Magnetic Fields
- Read the following paragraph and answer the questions given below.
Ferromagnetic substances are those which get strongly magnetized when placed in an external magnetic field. They have strong tendency to move from a region of weak magnetic field to strong magnetic field, that is, they get strongly attracted to a magnet. The individual atoms (or ions or molecules) in a ferromagnetic material possess a dipole moment as in a paramagnetic material. However, they interact with one another in such a way that these spontaneously align themselves in a common direction over a macroscopic volume called domain. Each domain has a net magnetization. Typical domain size is 1 mm and the domain contains about \(10^{11}\) atoms. In the first instant the magnetization varies randomly from domain to domain and there is no bulk magnetization. When we apply an external magnetic field \(B_0\) the domains orient themselves in the direction of \(B_0\) and simultaneously that domain oriented in the direction of \(B_0\) grows in size. We may wonder as to what happens when the external field is removed, in some ferromagnetic materials the magnetization persists. Such materials are called hard magnetic materials of hard magnets. Alnico, an alloy of iron, aluminium, nickel, cobalt and copper is one such material. There is a class of magnetic materials in which the magnetization disappears on removal of the external field. Soft iron is one such material. Such materials are called soft ferromagnetic materials. There are number of elements which are ferromagnetic. Iron, cobalt, Nickel, gadolinium etc. The ferromagnetic property depends on temperature. At high enough temperature a ferromagnet becomes a paramagnet. That domain structure disintegrates with temperature. This disappearance of magnetization with the temperature is gradual.- PSEB XII - 2025
- Magnetic Field
- Write the assumptions, sign conventions and then derive the mirror formula for concave mirror.
- PSEB XII - 2025
- Mirrors And Reflections
- Using Gauss' theorem, derive an expression for electric field intensity due to a uniformly charged hollow sphere (shell) at a point outside the shell and at a point inside the shell.
- PSEB XII - 2025
- Electric and Magnetic Fields
- What is diffraction of light? Explain diffraction at a single slit and deduce the expression for the width of its central maxima.
View More Questions