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    Physics HW 7 ECF QP

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    Physics HW 7 ECF QP

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    6 views2 pages

    Physics HW 7 ECF QP

    Uploaded by

    lathachinnathambi6

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    © All Rights Reserved
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    Download as pdf or txt
    of 2

    ATLANTIC INTERNATIONAL SCHOOL

    PHYSICS –ENGINEERING
    ASSIGNMENT WORK
    ELECTROSTATICS
    ENGINEERING PHY MCQ 2
    IMPORTANT INSTRUCTION

    Test Question Paper Consists of 10 questions. Each question carries 4 marks. For Wrong answer 1 Negative Marks
    shall be deducted.

    Letter Grade Outstanding(𝑺) Excellent(𝑨+ ) Good(𝑨) Average(𝑩+ ) Try Next Set(𝑹𝑨)


    Grade Point 10 9 8 7 6

    1. Two-point charges +𝑸 and +𝟒𝑸 are placed 3. Two positive ions each carrying a charge "𝑸"
    are separated by a distance of 𝟏𝟎 𝒄𝒎. If "𝑭"
    at a distance "𝒂" apart on a horizontal plane.
    is the force of repulsion between the ions,
    Where should the third charge be placed for then determine the number of missing
    electrons from each ion is.
    it to be in equilibrium?
    a. 𝑛 = [√1256𝜀𝐹⁄𝑒 2 ]
    a. 𝑥 = [2𝑎⁄3]

    b. 𝑛 = [√400𝜀𝐹⁄𝑒 2 ]
    b. 𝑥 = [4𝑎⁄3]

    c. 𝑛 = [√1256𝜀𝐹⁄ 2 ]
    c. 𝑥 = [6𝑎⁄3] √𝑒

    d. 𝑛 = [√400𝜀𝐹⁄ 2 ]
    d. 𝑥 = [8𝑎⁄3] √𝑒

    4. Two electrons are separated by a distance


    2. The relative permittivity of mica is "𝟔". Then "𝒓" metre and have force "𝑭". Two 𝜶
    its permittivity is. particles separated by "𝟐𝒓" metre. Then the
    force is.
    a. 𝜀 = 50.125𝑋10−12 𝐶 2 𝑁 −1 𝑚−2
    a. 𝐹
    b. 𝜀 = 50.125𝑋10−12 𝐶 2 𝑁1 𝑚−2
    b. 2𝐹

    c. 𝜀 = 53.125𝑋10−12 𝐶 2 𝑁 −1 𝑚−2 c. 0.5𝐹

    d. 𝜀 = 53.125𝑋10−12 𝐶 2 𝑁1 𝑚−2 d. 4𝐹

    Preshnave Muthukutty | NEET JEE – Physics


    5. When the distance of the two charges is 8. Which of the following is/are the limitation
    doubled, then the force is. of Coulombs Law?

    a. Coulombs law holds for point charges


    a. Doubled 2 times
    and rotating charges.

    b. Doubled 3 times b. Coulombs law holds for surface


    charges and rotating charges.
    c. Doubled 4 times
    c. Coulombs law holds for volume
    d. Reduced 4 times charges and stationary charges.

    d. Coulombs law holds for point charges


    and stationary charges.
    6. When 𝟏𝟎𝟏𝟗 electrons are removed from a
    neutral metal plate, then the electric charge
    on it is. 9. Assertion(A): Coulombs law of electric force
    a. 1.6 𝐶 obey Newtons third law of motion.

    b. −1.6 𝐶 Reason(R): The force exerted by two charges


    c. 1019 on each other are equal and opposite.

    d. 10−19 a. Both A and R are true and R is the


    correct explanation of A.

    7. The total charges of the system containing b. Both A and R are true and R is not the
    four charges −𝟐𝝁𝑪, −𝟐𝝁𝑪, −𝟑𝝁𝑪 and correct explanation of A.
    +𝟒𝝁𝑪. Then the total charge on the system
    c. A is true but R is false.
    is.
    d. A is false and R is also false.
    a. 3𝜇𝐶

    b. −3𝜇𝐶
    10. Which of the following is the condition for
    c. 5𝜇𝐶 two charges will be attractive?

    a. 𝑄1 𝑄2 > 0
    d. −5𝜇𝐶
    b. 𝑄1 𝑄2 < 0

    c. 𝑄1 𝑄2 = 0

    d. 𝑄1 𝑄2 ≤ 0

    Preshnave Muthukutty | NEET JEE – Physics

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