EASY
12th Telangana Board
IMPORTANT
Earn 100

Define linear charge density.

Important Questions on Electric Charges and Fields

MEDIUM
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 22
What is meant by electric field lines? Write its two properties.
EASY
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 23
A single charge negative ion and an electron are allowed to move from rest in a uniform electric field. Which of them will move faster and why? 
HARD
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 24
An oil drop of 12 excess electrons is held stationary under a constant electric field of  2.55×104 N/C (Millikan’s oil drop experiment). The density of the oil is 1.26 gmcm3. Estimate the radius of the drop. (g = 9.8 m/s2; e= 1.6×10-19C).
HARD
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 25
Obtain the formula for the electric field due to a long thin wire of uniform linear charge density E without using Gauss’s law. [Hint: Use Coulomb’s law directly and evaluate the necessary integral.]
HARD
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 26
Verify Gauss's law from Coulomb's law.
HARD
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 27

Which among the curves shown in the figure cannot possibly represent electrostatic field lines?

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EASY
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 28
Give definition of electric dipole moment.
MEDIUM
12th Telangana Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 29
A system has two charges qA=2.5×10-7C and  qB = -2.5×10-7 C located at points A: 0,0,-15 cm and B: 0,0,15 cm, respectively. What is the total charge and electric dipole moment of the system?