COMEDK · Physics · 30. Semiconductors
A transistor is connected in CE configuration. The collector supply is \(10 \mathrm{~V}\) and the voltage drop across a resistor of \(1000 \Omega\) in the collector circuit is \(0.5 \mathrm{~V}\). If the current gain factor is 0.96 , then the base current is
- A \(15 \mu \mathrm{A}\)
- B \(25_6 \mu \mathrm{A}\)
- C \(20.8 \mu \mathrm{A}\)
- D \(22.5 \mu \mathrm{A}\)
Answer & Solution
Correct Answer
(C) \(20.8 \mu \mathrm{A}\)
Step-by-step Solution
Detailed explanation
The collector current \(I_C\) is determined by the voltage drop across the collector resistor \(R_C = 1000 \Omega\). Given the voltage drop \(V_R = 0.5 \mathrm{~V}\), we have \(I_C = \dfrac{V_R}{R_C} = \dfrac{0.5}{1000} = 0.5 \times 10^{-3} \mathrm{~A} = 500 \mu \mathrm{A}\).…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A long spring, when stretched by a distance \(x\), has potential energy \(U\). On increasing the stretching to \(n x\), the potential energy of the spring will beCOMEDK 2023 Easy
- For a short magnet, the magnetic field on the axial line at a distance 10 cm from its centre is \(1.6 \mathrm{~m} \times 10^{-7} \mathrm{~T}\). What is the magnetic field on its equatorial line at the same distance 10 cm from its centre?COMEDK 2025 Easy
- If two waves of the same frequency and amplitude respectively on superposition produce a resultant disturbance of the same amplitude, the waves differ in phase byCOMEDK 2013 Easy
- Choose the correct statement.COMEDK 2012 Easy
- On increasing the temperature of a conductor, its resistance increases becauseCOMEDK 2024 Easy
- \(\mathrm{SI}\) unit of permittivity isCOMEDK 2013 Easy
More PYQs from COMEDK
- What is the percentage dissociation of 0.8ml of Acetic acid (density is 1.04g/ml) which is dissolved in 1.2L of water if the observed Depression in freezing point is 0.0228 K? (\(K_f\) for water = 1.86Kkg/mol.)COMEDK 2026 Medium
- In acidic medium, potassium permanganate oxidises oxalic acid toCOMEDK 2014 Medium
- A boy is running along a straight horizontal road with a constant speed \(5 \mathrm{~ms}^{-1}\). While running he throws a stone with a velocity \(30 \mathrm{~ms}^{-1}\) at an angle \(60^{\circ}\) with the horizontal. Then the time of flight of the stone is: (Given \(g=10 \mathrm{~ms}^{-2}\) )COMEDK 2025 Easy
- To the potentiometer wire of length \(L\) and \(10 \Omega\) resistance, a battery of emf \(2.5 \mathrm{~V}\) and a resistance \(R\) are connected in series. If a potential difference of \(1 \mathrm{~V}\) is balanced across \(L\) / 2 length, the value of \(R\) in \(\Omega\) will beCOMEDK 2020 Medium
- When a body moves in a circular path, no work is done by the force sinceCOMEDK 2013 Easy
- Vishnu has two jars of marbles, Jar A and Jar B.
Jar A contains 3 yellow marbles and 2 green marbles.
Jar B contains 4 yellow marbles and 3 green marbles.
Vishnu flips a fair coin.
If it lands heads, he picks two marbles at random without replacement from Jar A.
If it lands tails, he picks two marbles at random with replacement from Jar B.
Given that Vishnu picked one yellow and one green marble, what is the probability that they came from Jar B?COMEDK 2026 Medium