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Day 626: JEE Mains Physics

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

  1. Question 1

    Current Electricity. Asked once: 27 Jul 2022

    21
    In meter bridge experiment for measuring unknown resistance ' SS ', the null point is obtained at a distance 30 cm30\text{ }cm from the left side as shown at point DD. If RR is 5.6kΩ5.6k\Omega, then the value of unknown resistance ' SS ' will be ____\_\_\_\_ Ω\Omega.

  2. Question 2

    Electrostatics. Asked once: 2021 Paper 22

    29
    A capacitor of 50μF50\mu F is connected in a circuit as shown in figure. The charge on the upper plate of the capacitor is ___ μC\mu C.

  3. Question 3

    Semiconductor Electronics. Asked once: 2021 Paper 26

    9
    Draw the output YY in the given combination of gates: AA passes through a NAND gate with both of its inputs tied together; its output and BB feed an OR gate, and the OR output passes through a NOT gate to give YY. The input waveforms are shown.

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  4. Question 4

    Current Electricity. Asked once: 27 Jul 2022

    25
    A 1 m1\text{ }m long copper wire carries a current of 1 A1\text{ }A. If the cross section of the wire is 2.0 mm22.0{\text{ }mm}^{2} and the resistivity of copper is 1.7×10−8Ωm1.7 \times10^{- 8}\Omega m. the force experienced by moving electron in the wire is ____\_\_\_\_ ×10−23 N\times10^{- 23}\text{ }N. (charge on electron =1.6×10−19C= 1.6 \times10^{- 19}C )

  5. Question 5

    Electrostatics. Asked once: 2021 Paper 21

    6
    Three capacitors C1=2μF,C2=6μFC_{1}= 2\mu F,C_{2}= 6\mu F and C3=12μFC_{3}= 12\mu F are connected as shown in figure. Find the ratio of the charges on capacitors C1,C2C_{1},C_{2} and C3C_{3} respectively:

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