Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2026PhysicsChapterActual

The figure below shows the V-I characteristics of a semiconductor device under different levels of incident light intensity ( E₁, E₂, E₃ ). Based on the given graph, identify the device and its standard operating condition.

Options

  1. ALight Emitting Diode operated in forward bias
  2. BPhotodiode operated in reverse bias
  3. CSolar cell operated with no external bias
  4. DZener diode operated in the reverse breakdown region

Correct answer

B. Photodiode operated in reverse bias

Step-by-step solution

Based on the given V-I characteristics graph: 1. The curves are plotted in the third quadrant, which means the device is operating under reverse bias (negative voltage and negative current). 2. The magnitude of the reverse current is in microamperes ( A) and it remains almost constant over a range of reverse voltages. This is known as the reverse saturation current. 3. The reverse saturation current increases as the intensity of incident light increases ( E₃ > E₂ > E₁ ). This behavior is characteristic of a photodi

Practice Chapter on Quantrex Academy →

More from Chapter

A solid spherical body of radius R , density , and specific heat capacity s is initially at temperature T₀ . It is placed in a vacuum chamber at absolute zero and cools by emitting 2026A straight canal has motorboats departing from two terminals at opposite ends. The motorboats depart at regular intervals of T minutes in both directions and travel at a constant s 2026A wooden crate is released from rest at the top of a ramp inclined at 37^ to the horizontal. When the ramp is perfectly smooth, the crate reaches the bottom with a speed v . When t 2026A uniform horizontal beam of mass 6 kg and length L is hinged to a vertical wall at one end. The other end is supported by a light inextensible wire attached to the same wall, maki 2026A bullet P of mass 30 g moving with a speed of 200 m/s penetrates a target and comes to rest after travelling a distance of 10 cm inside it. Another bullet Q of mass 20 g moving wi 2026A small block of mass m is placed at the highest point of a smooth fixed sphere of radius R . It is given a horizontal initial speed v₁ such that it slides down the surface. The bl 2026A block of mass 2 kg is projected with an initial speed of 14 m/s on a rough horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.2 . Afte 2026A uniform horizontal circular disc of mass M and radius R is rotating freely about a vertical axis passing through its center at an angular speed of 40 rpm . Two small blocks, each 2026 Full Chapter list All NEET PYQs