Recent content by nik jain

Homework Statement Figure shows two coils placed close to each other . When the key is pressed so that a current starts building up in one the coils (a) a current flows along CBA in the loop (b) a current flows along ABC in the loop (c) No current flows through the loop (d) An...

I also want to know that can we use star to delta formation here as in this case applying of krichoff's law is easy , but what if all the value of capacitance is different ?

Yes the ans. is 20/7 F and I also get it by using krichoff's law

I got it . It is the electrostatic force of attraction b/w the charges . One more question : Why its value remains constant as the distance(r) b/w the charges goes on decreasing and magnitude of force of attraction is inversely proportional to r^2 ?

Find the equivalent capacitance of the combinations shown in the fig. (refer to the file attached) Is there any easier method to solve instead of this method by assuming a constant potiential difference is applied across the circuit and a total charge Q flown in it.

Force act on dielectric slab on inserting between the parallel plate = [8.85 * 10^-12]b(k-1)(V^2)/2d where b = width of the plate , d = distance b/w the plates , V is the constant potential difference across the plates and k = dielectric constant Which force is acting on dielectric...

Homework Statement Let Pn denotes the no. of ways of selecting 3 people out of 'n' sitting in a row if no two of them are consecutive and Qn is the corresponding figure when they are in circle . If Pn - Qn = 6 , then 'n' is equal to: The Attempt at a Solution Pn = (n-2) C 3 Qn =...

Yes Tension is not constant. Let the block moves a distance (x) . 1/2m[v(a)^2] = Tx (By energy conservation) 1/2m[v(a)^2] = mAx (A is the acceleration of block A) 1/2m[v(a)^2] = mv(a)(dv/dx)x integrating it v(a) = (2x)^1/2 again integrating it t(a) = (L/2)^1/2 How to get...

Homework Statement Two blocks A and B , each of same mass m are attached by a thin inextensible string through an ideal pulley . Initially block B is held in position as shown in figure . Now the block B is released . Block A will slide to right and hit the pulley in time t(a) . Block B...

Homework Statement Find the no. of +ve integral solution of XYZ = 21600

Thanks a lot I get it .

Need a little bit more help what is the value of moment of inertia and it is about which axis ?

MwR(R-h) + Iw = Iw' Mw0.6(R^2) + 0.4Mw(R^2) = 0.4M(R^2)w' w'= 5w/2 Please tell the mistake

Homework Statement A solid uniform sphere of radius R and mass M rolls without slipping with angular velocity (w) when it encounters a step of height 0.4R . find the angular velocity immediately after inelastic impact with the rough step. Homework Equations The Attempt at a...

THANKS to you all for the help..