Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 10

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If two identical spheres having charge $16 μ C$ and $- 8 μ C$ are kept at certain distance apart, then the force is $F$ . They are touched and again kept at the same distance, the force becomes

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Important Questions on Electric Charges and Fields

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 11

A deuteron and an

α

-particle are placed in an electric field. The force acting on them are

F_{1}

and

F_{2}

and their accelerations are

a_{1}

and

a_{2}

respectively, then

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 12

Three equal charges $+ Q$ each are at the corners of an equilateral triangle as shown. The intensity of electric field at $O$ will be

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 13

Two very small spheres

A

and

B

are charged with

+ 10

and

+ 20

coulomb respectively and separated by a distance of

80 cm

. The electric field at point on the line joining the centres of the two spheres will be zero at almost how much distance from

A

?

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 14

An electric dipole having charges

+ q

and

- q

are at a separation

r

. At distance

d > > r

along the axis of the dipole, the field is proportional to

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 15

Electric field lines about a negative point charge are

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 16

An electric dipole placed in a uniform electric field experiences, in general

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 17

An electric dipole consists of two opposite charges each of magnitude

2 μ C

separated by a distance

1 cm

. The dipole is placed in an external field of

10^{3} N C^{- 1}

. The maximum torque on the dipole is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 18

A point

B

lies on the perpendicular bisector of an electric dipole of dipole moment

\vec{p}

. The distance of $B$ from the dipole is

r

(

r

is much larger than the size of the dipole). The electric intensity at

B

is proportional to