Two equal drops of water with the same and similar charge coalesce to form a large single drop. Show how the surface density, capacity, potential and energy change.
1 Answers
Talk Doctor Online in Bissoy App
Two drops of the same radius are falling through air with a steady velcoity of `5 cm s^(-1).` If the two drops coalesce, the terminal velocity would b
Correct Answer - C If two drops of same radius r coalesce then radius of new drop is given by R `(4)/(3)piR^(3) = (4)/(3)pir^(3) + (4)/(3)pir^(3) implies R^(3)=2r^(3) implies R =...
2 Answers 1 views
Several spherical drops of a liquid of radius `r` coalesce to form a single drop of radius `R`. If `T` is surface tension and `V` is volume under cons
Correct Answer - B Energy released `=4piTR^(3)[(1)/(r )-(1)/(R )] = 3((4)/(3)piR^(3)) T[(1)/(r )-(1)/(R )] = 3VT[(1)/(r ) - (1)/(R )]`
2 Answers 1 views
Two drops of same radius are falling through air with steady velocity of `v" "cm//s`. If the two drops coalesce, what would be the terminal velocity ?
Correct Answer - B `V_("Big")=2V_("Small")" "impliesR_(B)=2^(1//3)R_(S)` `v_(T)=(2)/(9)(piR^(2)(rho-sigma)g)/(eta)=v_(T)propR^(2)" "impliesv_(T(B))=2^(2//3)v_(T(S))impliesv_(T(B))=4^(1//3)v_(T(S))`
2 Answers 1 views
Let `q_1` be a positive charge equal to the magnitude of the total charge on all electrons present in 0.9 mg of pure water and `q_2` be the charge on
Correct Answer - (a). 120000N (b). Force is nearly 10 times the weight of the car two conclusions can be drawn from the result- (i). Electrostatic force is a strong...
2 Answers 5 views
64 droplets of water of equal size unite from a large drop. If each dropet had equal and similar charge, how would the potential energy and capacitanc
Correct Answer - Potential will increase 16 times capacitance 4 times and energy 16 times
2 Answers 1 views
Two spherical raindrops of radii 1 mm and 2 mm come in contact with a lighting conductor at a potential of 500 volts and coalesce. Find the potnetial
Correct Answer - `721V,4.172xx10^(-8)J,1.8xx10^(-8)J`gained due to coalescence.
2 Answers 1 views
Eight charged drops of water, each of radius 1 m and having a charge of `10^(-10)` coulomb, combine to form a bigger drop. Determine the potential of
Correct Answer - 3600 V
2 Answers 1 views
An oil drop of radius `10^(-6)m` carries a charge equal to that on an electron. If the density of the oil is `2xx10^(3)kg m^(3)`, find the electric fi
Correct Answer - `5.13 xx 10^(5) Vm^(-1)`
2 Answers 1 views
`N` drops of mercury of equal radii and possessing equal charges combine to from a big drop. Compare the charge, capacitance and potential of bigger d
Correct Answer - `N,N^(1//3),N^(2//3)`
2 Answers 1 views
Water drops are falling from a tip at regular time intervals. When the fifth drop is near to fall from tap the first drop is at ground. If the top is
Correct Answer - (i)`(7)/(16)H` (ii)`(5)/(16)H` (iii)`sqrt((Gh)/(2))`
2 Answers 1 views