HARD
12th West Bengal Board
IMPORTANT
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An ionised helium particle (+2l) is situated at the origin (0,0) . How much work is done in taking an electron from x=3 cm to x=6 cm?

Important Questions on Interaction of Charged Particles, Electric Field and Potential

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 40
A particle of mass 10-3 kg and charge 5μC enters into a uniform electric field of 2×105NC-1, moving with a velocity of 20 ms-1, in a direction opposite to that of the field. Calculate the distance it would travel before coming to rest.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 41
A liquid drop hangs in equilibrium between two metal plates separated by a distance of 2 cm and maintained a potential difference of 600 volts. Calculate the charge on the drop if the radius of drop is 0.1 cm and density of the liquid is 800 Kg/m3 
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 42
A charge of 60nC is placed at the corner A of a square A B C D of side 10cm. Another charge of -40nC is located at the centre of the square. Find the work done in carrying a charge of 5nC from the corner C to the corner B of square.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 43
Two particles A and B having charges 8×10-6 coulomb and -2×10-6 coulomb respectively are held fixed with separation of 20 cm. Where should a third charged particle be placed so that it does not experience any electric force?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 44
The electric potential in certain situation is found to depend on x only and is given by V(x)=ax-bx2,a and b are constants. Find the position on the X-axis where the electric intensity is zero. 
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 45
Two charges +1μC and -1μC Are placed at the corners of the base of an equilateral triangle. The length of the side of the triangle is 0.7 m. Find the electric field intensity at the apex of the triangle.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 46
A particle of charge 12×10-9 Coulomb and mass 5 Gram moves a distance 300 cm Under the action of potential difference of 500 V. Find the velocity and acceleration of the particle if it starts 500 V. Find the velocity and acceleration of the particle if it starts from rest.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 47
Three point charges of +2μC,-3μC and -3μC are kept at the vertices A, B and C respectively of an equilateral triangle of side 20 cm as shown in the Fig. 2.104. What should be the sign and magnitude of the charge to be placed at the mid point (M) of side BC so that the charge at A remains in equilibrium?