The dominant contribution to current comes from holes in case of
Show Hint
- metals
- intrinsic semiconductors
- p-type extrinsic semiconductors
- n-type extrinsic semiconductors
The Correct Option is C
Solution and Explanation
Holes are majority carriers in p-type semiconductors.
Step 2: Detailed Explanation:
In p-type, holes are majority charge carriers and dominate current.
Step 3: Final Answer:
p-type extrinsic semiconductors.
Top MET Physics Questions
- Radiation, with wavelength 6561 $?$ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of $3 \times 10^{-4} T$. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :
- MET - 2020
- Physics
- Photoelectric Effect
- 1 g of water at atmospheric pressure has volume of 1 cc and when boiled it becomes 1681 cc of steam. The heat of vaporisation of water is 540 cal/g. Then the change in its internal energy in this process is
- MET - 2019
- Physics
- Thermodynamics terms
- The temperature coefficient of resistance of a wire is 0.00125 °C\(^{-1}\). At 300 K, its resistance is 1 \(\Omega\). At what temperature the resistance of the wire will be 2 \(\Omega\)?
- MET - 2019
- Physics
- Current electricity
- A parallel plate capacitor has an electric field of \(10^5\) V/m between the plates. If the charge on the capacitor plate is 1 \(\mu\)C, the force on each capacitor plate is
- MET - 2019
- Physics
- Electrostatics
- A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace enclosing area 0.01 m\(^2\) in such a way that the plane of the necklace is normal to the field and is having a resistance \(R = 0.01\ \Omega\). Because of power failure, the field decays to 1 T in time \(10^{-3}\) s. Then what is the total heat produced in her necklace?
- MET - 2019
- Physics
- Electromagnetic induction
Top MET Semiconductor electronics: materials, devices and simple circuits Questions
- If no external voltage is applied across p-n junction, there would be
- MET - 2019
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- The valence band and conduction band of a solid overlap at low temperature, the solid may be
- MET - 2019
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- In the figure shown below, which of the diodes are forward biased?}
- MET - 2018
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- A semiconductor has an electron concentration of $8\times 10^{13} / \mathrm{m}^{3}$ and hole concentration of $5.5\times 10^{12} / \mathrm{m}^{3}$. The semiconductor is
- MET - 2018
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- A transistor is used in common-emitter configuration. Given its $\alpha = 0.9$, calculate the change in collector current when the base current changes by $2\mu \mathrm{A}$.}
- MET - 2018
- Physics
- Semiconductor electronics: materials, devices and simple circuits
Top MET Questions
- Radiation, with wavelength 6561 $?$ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of $3 \times 10^{-4} T$. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :
- MET - 2020
- Photoelectric Effect
- If \(f(x) = \begin{cases} x, & 0 \le x \le 1 \\ 2x - 1, & 1<x \end{cases}\), then
- MET - 2019
- Continuity
Helicopters are very different from airplanes. They can do three things that airplanes cannot do. First, when airplanes move upward, they must also move forward, but helicopters can move straight up without moving ahead. Second, helicopters can fly backward, which airplanes cannot do. Third, helicopters can use their rotors to hover in the air, which is impossible for airplanes. Helicopters can perform actions that airplanes cannot, they are used for different tasks. Since, helicopters can take off without moving forward, they do not need a runway for take off. They are used in congested areas where there is no room for airplanes or in isolated areas, which do not have airports. Because they can hover, they are used on firefighting missions to drop water on fires. They are used in logging operations to lift trees out of forests. Helicopters are used as air ambulances to airlift patients out of situations, which are difficult to reach by conventional ambulances. The police used helicopters to follow suspects on the ground or to search for cars on the ground. Of course, helicopters have military uses because of their design and capabilities.
- MET - 2019
- Reading Comprehension
- Find the missing character.
- MET - 2019
- Number Patterns
- 6, 9, 12, 15, 18, ?
- MET - 2019
- Number Patterns