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Queens Land
Subject: Physics
, asked on 23/5/18
Solve this:
Q. Calculate the work done in taking a charge - 2
$\times {10}^{-9}$
C from A to B via C (in diagram)
(1) 0.2 joule
(2) 1.2 joule
(3) 2.2 joule
(4) Zero
Answer
1
Queens Land
Subject: Physics
, asked on 23/5/18
Solve this:
Q. A hollow charged metal sphere has radius r. If the potential difference between its surface and a point at a distance 3r from the centre is V, then the electric field intensity at distance 3r from the centre is
(1)
$\frac{V}{3r}$
(2)
$\frac{V}{4r}$
(3)
$\frac{V}{6r}$
(4)
$\frac{V}{2r}$
Answer
1
Queens Land
Subject: Physics
, asked on 23/5/18
Solve this:
Q. Calculate the work required to be done to make an arrangement of three particles each having a charge + q such that the particles lie at the vertices of an equilateral triangle of side a. What work will be done by electric field when the particles are shifted away so that the side of triangle becomes 2a ?
Answer
1
Vani Singh
Subject: Physics
, asked on 22/5/18
Solve this:
Answer
1
Vani Singh
Subject: Physics
, asked on 22/5/18
Solve this:
Answer
1
Sangeeta Jha
Subject: Physics
, asked on 22/5/18
pls solve this
Q.18. Five capacitors, each of capacitance value C are connected as shown in the figure. The ratio of capacitance between P and R, and the capacitance between P and Q is :
(1) 3 : 1
(2) 5 : 2
(3) 2 : 3
(4) 1 : 1
Answer
1
Kabir Chhabra
Subject: Physics
, asked on 22/5/18
What happens to current(q), Potential (V), Electric field (E) and capacitance(C) with battery and without battery when dipole is not inserted?
Answer
1
Sudhanshu Singh
Subject: Physics
, asked on 19/5/18
Solve this
Problem 19) Figure 2.156 shows two capacitors joined in series, the rigid central section of length b being movable. Prove that the equivalent capacitance of the combination is independent of the position of the central section.
Answer
1
Raj Aryan
Subject: Physics
, asked on 19/5/18
Solve fast plz!
Answer
1
Noel George Cherian
Subject: Physics
, asked on 18/5/18
22. In the given figure, charge +Q is placed at the centre of a dotted circle. Work done in taking
another charge +q from A to B is W
_{1}
, and from B to C is W
_{2}
. Which one of the following is correct:
W
_{1 }
> W
_{2}
, W
_{1 }
= W
_{2}
and W
_{1 }
< W
_{2}
?
23. How many electrons must be added to one plate and removed from the other so as to store 25.0
J of energy in a 5.0 nF parallel plate capacitor? (b) How would you modify this capacitor so that it
can store 50.0 J of energy without changing the charge on its plates?
Answer
1
Noel George Cherian
Subject: Physics
, asked on 18/5/18
Solve this :
$16.37.\mathrm{A}\mathrm{system}\mathrm{of}\mathrm{capacitors}\mathrm{connected}\mathrm{as}\mathrm{shown}\mathrm{in}\mathrm{the}\mathrm{figure}\mathrm{has}\mathrm{a}\mathrm{total}\mathrm{energy}\mathrm{of}160\mathrm{mJ}\mathrm{stored}\mathrm{in}\mathrm{it}.\mathrm{Obtain}\mathrm{the}\mathrm{value}\mathrm{of}\mathrm{the}\mathrm{equivalent}\mathrm{capacitance}\mathrm{of}\mathrm{this}\mathrm{system}\mathrm{and}\mathrm{the}\mathrm{value}\mathrm{of}\mathrm{Z}.\left[\mathrm{All}\mathrm{India}2009\mathrm{c}\right]\phantom{\rule{0ex}{0ex}}$
Answer
2
Noel George Cherian
Subject: Physics
, asked on 18/5/18
Q.11. Find the charge and potential difference across each capacitor. C1 = C2 = C4 = 1pF, C3 = C5 = C6 = 2pF and V = 10 V.
Answer
1
Noel George Cherian
Subject: Physics
, asked on 18/5/18
Determine the equivalent capacitance between A and B for the group of capacitors in the drawing. If a cell of 12V is connected across A & B, calculate the charge & potential difference across each capacitor
Answer
1
Noel George Cherian
Subject: Physics
, asked on 18/5/18
a. Derive an expression for (a) the common potential and (b) the energy lost when the charged capacitorC1 is disconnected from the source of p.d. V1 and connected in parallel with another capacitor C2 charged by a different source of potential difference V2. Where does this loss of energy appear?
b. A capacitor of 400pF is charged by a 100V battery. The battery is then disconnected and the charged capacitor is connected to another uncharged capacitor of 100 pF. Calculate the difference between the final energy stored in the combined system and the initial energy stored in the single capacitor. Account for the difference in the initial and final energies.
Answer
1
Noora
Subject: Physics
, asked on 18/5/18
3 constantan wires p,q and r of length and area of cross section (l,a),(2l,a/2) and (l/2,2a) which has highest resistance?
Answer
2
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What are you looking for?

Q. Calculate the work done in taking a charge - 2$\times {10}^{-9}$ C from A to B via C (in diagram)

(1) 0.2 joule

(2) 1.2 joule

(3) 2.2 joule

(4) Zero

Q. A hollow charged metal sphere has radius r. If the potential difference between its surface and a point at a distance 3r from the centre is V, then the electric field intensity at distance 3r from the centre is

(1) $\frac{V}{3r}$

(2) $\frac{V}{4r}$

(3) $\frac{V}{6r}$

(4) $\frac{V}{2r}$

Q. Calculate the work required to be done to make an arrangement of three particles each having a charge + q such that the particles lie at the vertices of an equilateral triangle of side a. What work will be done by electric field when the particles are shifted away so that the side of triangle becomes 2a ?

Q.18. Five capacitors, each of capacitance value C are connected as shown in the figure. The ratio of capacitance between P and R, and the capacitance between P and Q is :

(1) 3 : 1

(2) 5 : 2

(3) 2 : 3

(4) 1 : 1

Problem 19) Figure 2.156 shows two capacitors joined in series, the rigid central section of length b being movable. Prove that the equivalent capacitance of the combination is independent of the position of the central section.

another charge +q from A to B is W

_{1}, and from B to C is W_{2}. Which one of the following is correct:W

_{1 }> W_{2}, W_{1 }= W_{2}and W_{1 }< W_{2}?23. How many electrons must be added to one plate and removed from the other so as to store 25.0

J of energy in a 5.0 nF parallel plate capacitor? (b) How would you modify this capacitor so that it

can store 50.0 J of energy without changing the charge on its plates?

Solve this :$16.37.\mathrm{A}\mathrm{system}\mathrm{of}\mathrm{capacitors}\mathrm{connected}\mathrm{as}\mathrm{shown}\mathrm{in}\mathrm{the}\mathrm{figure}\mathrm{has}\mathrm{a}\mathrm{total}\mathrm{energy}\mathrm{of}160\mathrm{mJ}\mathrm{stored}\mathrm{in}\mathrm{it}.\mathrm{Obtain}\mathrm{the}\mathrm{value}\mathrm{of}\mathrm{the}\mathrm{equivalent}\mathrm{capacitance}\mathrm{of}\mathrm{this}\mathrm{system}\mathrm{and}\mathrm{the}\mathrm{value}\mathrm{of}\mathrm{Z}.\left[\mathrm{All}\mathrm{India}2009\mathrm{c}\right]\phantom{\rule{0ex}{0ex}}$

b. A capacitor of 400pF is charged by a 100V battery. The battery is then disconnected and the charged capacitor is connected to another uncharged capacitor of 100 pF. Calculate the difference between the final energy stored in the combined system and the initial energy stored in the single capacitor. Account for the difference in the initial and final energies.