Electric Charges & Fields

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Electric Charges & Fields - 03

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Q1. Two point charges + Q and + q are separated by a certain distance. If + Q > + q then in between the charges the electric field is zero at a point *

1 point

no where on the line segment joining + Q and + q

closer to + q

exactly at the mid-point of line segment joining + Q and +q

closer to + Q

Q2. An electric field can deflect *

1 point

None

neutrons

Gamma-rays

alpha particles

Q3. The unit of electric field is not equivalent to *

1 point

J /Cm

J / C

N / C

V / m

Q4. If an electron has an initial velocity in a direction different from that of an electric field, the path of the electron is *

1 point

a parabola

a circle

an ellipse

a straight line

Q5. A charged particle is free to move in an electric field. It will travel *

1 point

always along a line of force

along a line of force, if its initial velocity is zero

along a line of force, if it has some initial velocity in the direction of an acute angle with the line of force

None of Them

Q6. If a linear isotropic dielectric is placed in an electric field of strength E, then the polarization P is *

1 point

directly proportional to E

inversely proportional to E

independent of E

directly proportional to sq. root of E

Q7. A point charge is kept at the centre of metallic insulated spherical shell. Then *

1 point

electric field out side the sphere is zero

electric field inside the sphere is zero

net induced charge on the sphere is zero

electric potential inside the sphere is zero

Q8. If one penetrates a uniformly charged spherical cloud, electric field strength *

1 point

decreases directly as the distance from the centre

increases directly as the distance from the centre

remains constant

None of them

Q9. Electric lines of force about a negative point charge are *

1 point

radial, inwards

circular anticlockwise

circular clockwise

radial, outwards

Q10. Electric lines of force *

1 point

exist everywhere

exist only in the immediate vicinity of electric charges

exist only when both positive and negative charges are near one another

are imaginary

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