Subject: Physics, asked on 23/5/18

## Solve this: Q. Calculate the work done in taking a charge - 2$×{10}^{-9}$ C from A to B via C (in diagram) (1) 0.2 joule (2) 1.2 joule (3) 2.2 joule (4) Zero

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

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 ?

Subject: Physics, asked on 22/5/18

## Solve this:

Subject: Physics, asked on 22/5/18

## Solve this:

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

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?

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.

Subject: Physics, asked on 19/5/18

## Solve fast plz!

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 W1, and from B to C is W2. Which one of the following is correct: W1 > W2, W1 = W2 and W1 < W2 ? 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?

Subject: Physics, asked on 18/5/18

## Solve this :

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.

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

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.

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?

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