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Two points like charges Q(A) and Q(B) ar...

Two points like charges `Q_(A)` and `Q_(B)` are positioned at points a and B (see figure). The electric field strength to the right of charge `Q_(B)` on the line that passes through the two charges varies according to a law that is represented schematically in Figure below accompaanying the problem without employing a definite scale. Assume electric field to be positive if its direct ion coincides with (the positive direction on the x-axis. THe distance between the charges is l.

Text Solution

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The correct Answer is:
`(a) rarr (p), (b) rarr (q), (c ) rarr (r ), (d) rarr (s)`
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Two point charge Q_(a) and Q_(b) are positional at point A and B. The field strenght to the right of charge Q_(b) on the line that passes therough the two charges varies according to a law represented schematically in fig. (without employing a definite scale). The field strength is assumed to be positive if its direction coincedes with the positive direction of the x-axis. The distance between the charges is l=21 cm . (a) Find the sign of the charges. (b) Find the ration between the absolute value of charge Q_(a) and Q_(b) . (c ) Find the coordinate x of the point where the field strenght is maximum.

Two point charges Q_(1) and Q_(2) are positioned at points I and 2. The field intensity to the right of the charge Q_(2) on the line that passes through the two charges varies according to a law that is represented in the figure. The field intensity is assumed to be positive if its direction coincides with the positive direction on the x-axis. The distance between the charges is l. (a) Find the sign of each charge (b) Find the ratio of the absolute values of the charges |(Q_(1))/(Q_(2))| (c) Find the value of b where the field intensity is maximum [(a) Q_(2) is negative and Q_(1) is positive (b) ((l +a)/(a))^(2) , (c) (l)/(((l+a)/(a))^(2//3)-1)]

Knowledge Check

  • The given figure gives electric line of force due to two charges q_(1) and q_(2) . What are the signs of the two charges ?

    A
    Both are negative
    B
    Both are positive
    C
    `q_(1)` is positive but `q_(2)` is negative
    D
    `q_(1)` is negative but `q_(2)` is positive

  • Charges +2Q and -Q are placed as shown in figure. The point at which electric field intensity is zero will be

    A
    Somewhere between `-Q` and `+20`
    B
    Somewhere on the left of `-Q`
    C
    Somewhere on the right of `+2Q`
    D
    Somewhere on the right bisector of line Joining`-Q` and `+2Q`

  • The given figure gives electric lines of force due to two charges q_(1)and q_(1) . What are the signs of the two charges ?

    A
    `q_(1)` is positive but `q_(2)` is negative
    B
    `q_(1)` is negative but `q_(2)` is positive
    C
    Both are negative
    D
    Both are positive

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