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12th ICSE
IMPORTANT
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The relative permittivity of water is 81. If ε0 and ε are permittivity of vacuum and water respectively. Then:

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Important Questions on Electric Charges and Fields

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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 6
The ratio of the gravitational and the electrostatic forces between two electrons at some distance apart is:
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 7
A body has a positive charge of 8×10-19 C. It has :
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 8
Which one of the following is not a unit of electric field?
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 9
The figure shows the electric lines of force emerging from a charged body. If the electric fields at A and B are EA and EB respectively and the distance between them is r, then :
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EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 10
A proton and an electron are located in a uniform electric field. They will experience :
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 11
The electric field intensity at a large distance x from an electric dipole is proportional to :
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12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 12
A charge placed at a distance from an electric dipole in the end-on position experiences a force F. If the distance is doubled, the force will become:
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 1 - Electric Charges and Fields>QUESTIONS>Q 13
A dipole placed in a uniform electric field experiences :