Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 39

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IMPORTANT

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For the torque to be maximum on a dipole placed in an electric field angle between $\vec{P}$ and $\vec{E}$ must be

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Important Questions on Electric Charges and Fields

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12th Gujarat Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 38

In nature, the electric charge of any system is always equal to-

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 40

On placing a dipole in a uniform electric field it is acted upon by a

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 41

An electric dipole with dipole moment

4 \times 10^{- 9} C m

is aligned at

30^{°}

with the direction of a uniform electric field of magnitude

5 \times 10^{4} N C^{- 1}

. Calculate the magnitude of the torque acting on the dipole.

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 42

Explain the unstable equilibrium condition of a dipole in an electric field.

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 43

The dimensional formula of electric flux is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 44

A uniform electric field

E = 2 \times 10^{3} N C^{- 1}

is acting along the positive

x - axis

. The flux of this field through a square of

10 cm

side whose plane is parallel to the

y z

plane is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 45

The SI unit of surface integral of electric field is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 1 - Electric Charges and Fields>Exercise>Q 47

The force of attraction between

+ 5 μC

and

- 5 μC

charges kept at some distance apart is

9 N

. When the two charges are made to contact and then separated again by the same distance the force acting between them becomes