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Day 279: JEE Mains Physics

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

  1. Question 1

    Electrostatics. Asked once: 31 Jan 2023 (same type asked 5 times) See all 5 of this type

    29
    Expression for an electric field is given by E→=4000x2ı^Vm\overrightarrow{E}= 4000x^{2}\widehat{\imath}\frac{V}{m}. The electric flux through the cube of side 20 cm20\text{ }cm when placed in electric field (as shown in the figure) is______ VV cm

  2. Question 2

    Motion in a Plane. Asked once: 29 Jun 2022 (same type asked 5 times) See all 5 of this type

    13
    Two vectors A→\overrightarrow{A} and B→\overrightarrow{B} have equal magnitudes. If magnitude of A→+B→\overrightarrow{A}+\overrightarrow{B} is equal to two times the magnitude of A→−B→\overrightarrow{A}-\overrightarrow{B}, then the angle between A→\overrightarrow{A} and B→\overrightarrow{B} will be :

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  3. Question 3

    Semiconductor Electronics. Asked once: 1 Feb 2024 (same type asked 5 times) See all 5 of this type

    96
    Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm660\text{ }nm. The band gap of photodiode is found to be (X8)eV\left( \frac{X}{8} \right)eV. The value of XX is : (Given, h=6.6×10−34Js,e=1.6×10−19Ch = 6.6 \times10^{- 34}Js,e = 1.6 \times10^{- 19}C )

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  4. Question 4

    Work, Energy and Power. Asked once: 27 Jan 2024 (same type asked 5 times) See all 5 of this type

    9
    Two bodies of mass 4 g4\text{ }g and 25 g25\text{ }g are moving with equal kinetic energies. The ratio of magnitude of their linear momentum is:

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  5. Question 5

    Alternating Current. Asked once: 10 Apr 2023 (same type asked 5 times) See all 5 of this type

    12
    Given below are two statements: Statement I: Maximum power is dissipated in a circuit containing an inductor, a capacitor and a resistor connected in series with an ACAC source, when resonance occurs Statement II: Maximum power is dissipated in a circuit containing pure resistor due to zero phase difference between current and voltage. In the light of the above statements, choose the correct answer from the options given below:

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