Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 20203 SeptemberMorning Shift
Exam
JEE Main
Year
2020
Date
3 September
Shift
Morning Shift
Subject
Physics
Chapter
Semiconductors

JEE Main 2020 · 3 September · Morning Shift · Physics · Semiconductors

When a diode is forward biased, it has a voltage drop of 0 . 5V ....

When a diode is forward biased, it has a voltage drop of 0.5V0 . 5V . the safe limit of current through the diode is 10mA10mA. If a battery of emf 1.5V1 . 5V is used in the circuit, the value of minimum resistance to be connected in series with the diode so that the current does not exceed the safe limit is :When a diode is forward biased, it has a voltage drop of 0 . 5V . the safe limit of current through the diode is 10mA .

Options

  1. A300Ω300Ω
  2. B50Ω50Ω
  3. C100Ω100Ω
  4. D200Ω200Ω

Correct answer

C. 100Ω100Ω

Step-by-step solution

When a diode is forward biased, it has a voltage drop of 0 . 5V . the safe limit of current through the diode is 10mA .

Vdiode=0.5volt{V}_{diode} = 0 . 5volt

VR=1.5−0.5=1volt{V}_{R} = 1 . 5 - 0 . 5 = 1volt

iR=1iR = 1

R=1i=110−2=100ΩR = \dfrac{1}{i} = \dfrac{1}{{10}^{- 2}} = 100Ω

Practice Semiconductors on Quantrex Academy →

More from Semiconductors

The output Y for the given inputs A and B to the circuit is: JEE Main 2026Refer to the logic circuit given below. For two inputs (A=1, B=1) and (A=0, B=1) , output… JEE Main 2026The maximum rated power of the LED is 2 mW and it is used in the circuit with input… JEE Main 2026In a semiconductor p-n diode, the doping concentrations on p-side and n-side are 10^ 15… JEE Main 2026For the given logic circuit, which of the following inputs combination will make both LED… JEE Main 2026Given below are two statements: one is labelled as Assertion A and the other is labelled… JEE Main 2026A diode has Zener voltage of 10 V and maximum power dissipation of 0.5 W, then the… JEE Main 2026Two 4 bits binary numbers, A = 1101 and B = 1010 are given in the inputs of a logic… JEE Main 2026 Full Semiconductors list All JEE Main PYQs