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Day 618: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Semiconductor Electronics. Asked once: 25 Jul 2022

    116
    Two ideal diodes are connected in the network as shown in figure. The equivalent resistance between AA and BB is ____\_\_\_\_ Ω\Omega.

  2. Question 2

    Current Electricity. Asked once: 30 Jan 2023

    95
    The equivalent resistance between AA and BB is

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  3. Question 3

    Electrostatics. Asked once: 28 Jun 2022

    100
    Two- point charges AA and BB of magnitude +8×10−6C+ 8 \times10^{- 6}C and −8×10−6C- 8 \times10^{- 6}C respectively are placed at a distance dd apart. The electric field at the middle point OO between the charges is 6.4×104NC−16.4 \times10^{4}NC^{- 1}. The distance ' dd ' between the point charges A and B is:

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  4. Question 4

    Semiconductor Electronics. Asked once: 29 Jun 2022

    115
    A potential barrier of 0.4 V0.4\text{ }V exists across a p-n junction. An electron enters the junction from the nn-side with a speed of 6.0×105 ms−16.0 \times10^{5}{\text{ }ms}^{- 1}. The speed with which electron enters the pp side will be x3×105 ms−1\frac{x}{3}\times10^{5}{\text{ }ms}^{- 1} the value of xx is (Given mass of electron =9×10−31 kg= 9 \times10^{- 31}\text{ }kg, charge on electron =1.6×10−19C= 1.6 \times10^{- 19}C.)

  5. Question 5

    Current Electricity. Asked once: 30 Jan 2023

    14
    The charge flowing in a conductor changes with time as Q(t)=αt−βt2+γt3Q(t) = \alpha t - \beta t^{2}+ \gamma t^{3}. Where α,β\alpha,\beta and γ\gamma are constants. Minimum value of current is:

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