If the difference between the outer radius and the inner radius of a ring is 14 cm, then what is the difference between is outer circumference and innner circumference?
1 Answers
A ring of radius 1m is in xy-plane with centre at the origin. In each of option below, the moment of inertia of the ring about the line is calculated.
If axis lies inplane of ring/lies at a distance d from its centre. `I_(d)=(MR^(2))/(2)+Md^(2)=MR^(2)` `rArr d=(R)/sqrt(2)=(1)/sqrt(2)m` `therefore` distance of line from centre should be `(1)/sqrt(2)`
2 Answers 2 views
Short electric dipole of dipole moment P is placed at the centre of a ring of radius R having charge Q uniformly distributed on its circumference. The
Correct Answer - `(PQ)/(4pi in_(0)R^(3))`
2 Answers 1 views
A ring is made of a nearly superconducting mate- rial. Inductance of the ring is `L = 0.5 H`. A current allowed to decay in the ring was observed to r
Correct Answer - `1.9 xx 10^(-9) Omega`
2 Answers 1 views
Inside a cylindrical capacitor of inner radius a and outer radius b, an electron is projected from the surface of inner cylindrical shell perpendicula
Correct Answer - `[(eB (b^(2) - a^(2)))/(2 mb)]`
2 Answers 6 views
A long straight cylindrical hollow pipe has inner and outer radii 1 cm and 2 cm respectively. It carries a current 100 A. Calculate the magnetic field
Correct Answer - [(a) 0 (b) `5.56 xx 10^(-4)T` (c) `5 xx 10^(-4)T`]
2 Answers 1 views
A point charge Q is placed at the centre of an uncharged spherical shell of inner radius a and outer radius b. There is a small tunnel in the body of
Correct Answer - `(Q^(2))/(8piepsilon_(0))((1)/(a)-(1)/(b))`
2 Answers 1 views
A long solenoid of cross-sectional radius `a` has a thin insulates wiere ring tightly put on its winding, one half of the ring has the resistance `eta
Correct Answer - `(ab)/(2)((eta-1)/(eta+1))`
2 Answers 1 views
Find the resistance of a hollow cylindrical conductor of length 1.0m and inner and outer radii 1.0mm and 2.0mm respectively. The resistivity of the ma
Correct Answer - `2.1xx10^(-3) Omega`
2 Answers 1 views
If the thickness of a hermispherical bowl is 12 cm and its outer diameter is 10.24 m, then find the inner surface area of the hemisphere. (Take `pi=3.
Correct Answer - 20 cm
2 Answers 3 views
The inner dimensions of a swimming pool are `50ftxx20ftxx10ft`. The inner sides and the floor of the swimming pool have to be fixed with tiles of size
Correct Answer - Rs. 9000
2 Answers 1 views