coil The figure shows a closely wound coil on a square core of inside edge length l. The no. of turns per unit length of the coil is n. Each turn carries current i into the plane of paper and out of the plane of papers. ABCD is an Amperian loop enclosing an open surface in the plane of the paper. The current enclosed by the loop is Ruhul Amin Alig
coil To make the field radial in a moving coil galvanometer (a) the number of turns in the coil is increased (b) magnet is taken in the form of horse-shoe (c) poles are cylindrically cut (d) coil is wounded on aluminium frame Ruhul Amin Alig
coil The magnetic moment of a circular coil carrying current is (a) directly proportional to the length of the wire in the coil (b) inversely proportional to the length of the wire in the coil (c) directly proportional to the square of the length of the wire in the coil (d) inversely proportional to the square of the length of the wire in the coil Ruhul Amin Alig
coil Energy in a current carrying coil is stored in the form of (a) electric field (b) magnetic field (c) dielectric strength (d) heat Ruhul Amin Alig
coil The resistance of the coil of an ammeter is R. The shunt required to increase its range n-fold should have a resistance Ruhul Amin Alig
coil Water of volume 2 litre in a container is heated with a coil of 1 kW at 27°C. The lid of the container is open and energy dissipates at rate of 160 J/s. In how much time temperature will rise from 27°C to 77°C? [Given specific heat of water is 4.2 kJ/kg] (a) 8 min 20 s (b) 6 min 2 s (c) 7 min (d) 14 min Ruhul Amin Alig
![Water of volume 2 litre in a container is heated with a coil of 1 kW at 27°C. The lid of the container is open and energy dissipates at rate of 160 J/s. In how much time temperature will rise from 27°C to 77°C? [Given specific heat of water is 4.2 kJ/kg] (a) 8 min 20 s (b) 6 min 2 s (c) 7 min (d) 14 min](https://blogger.googleusercontent.com/img/a/AVvXsEjDmNz-oMNDkUNJT9-mwA1u9N-yZx-OGFS2jYeq2R3_-1xPn__xjAu6ub4NvDjol47vSQexAVvFrOzIvGbko0cmIEg5IEr1lLXM5fasMHX2P1my2aOfDgqAyf8X-2qLG6BWzoHpS90gPMwkIlo0onURVrVfmDePgrARtm-ehc2_XKFq37dsYTWXi8Zj_Q=w74-h74-p-k-no-nu)
