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The diagram shows electric field lines around two isolated point charges P and Q . At X , the field strength is zero.

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Which of the following statements is true?

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Important Questions on Electric Charges and Fields

EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 70
Which of the following configurations of electric lines of force is not possible?
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 71
Figures given below represent roughly the electric lines of force due to three positive point charges of equal value. Guess the possibly correct representation -
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 72
A laser beam of pulse power 1012 W is focused on an object of area 10-4 cm2. The electric flux in wattcm2 at the point of focus is
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 73
A charge q is placed at the centre of the open end of cylindrical vessel. The flux of the

Electric field through the surface of the vessel is
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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 74
A sphere of radius 1 m encloses a charge of 5 μC. Another charge of -5 μC is placed inside the sphere. The net electric flux would be
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 75
Consider the charge configuration and a spherical Gaussian surface as shown in the figure. When calculating the flux of the electric field over the spherical surface, the electric field will be due to

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CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 76

According to Gauss's theorem, the total outward normal flux over a closed surface is equal to

EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 77
The SI unit of surface integral of electric field is