# A moving coil galvanometer has a coil with 175 turns and area 1 cm2.  It uses a torsion band of torsion band constant N-m/rad.  The coil is placed in a magnetic field B parallel to its plane.  The coil deflects by 10 for a current of 1 mA.  The value of B (in Tesla) is approximately (a)  10−4 (b) 10−2 (c) 10−1 (d) 10−3

## Question ID - 51298 :- A moving coil galvanometer has a coil with 175 turns and area 1 cm2.  It uses a torsion band of torsion band constant N-m/rad.  The coil is placed in a magnetic field B parallel to its plane.  The coil deflects by 10 for a current of 1 mA.  The value of B (in Tesla) is approximately (a)  10−4 (b) 10−2 (c) 10−1 (d) 10−3

3537

NIAB=KQ

175 1 10−3 1 10−4 B= B= 9.97 104 T.

B=103 T.

Next Question :

(i)       Six flats on a floor in two rows facing North and South are allotted to P, Q, R, S, T and U.

(ii)      Q gets a North facing flat and is not next to S.

(iii)     S and U get diagonally opposite flats.

(iv)     R, next to U, gets a South facing flat and T gets a North facing flat.

If  the flats of T and P are interchanged, who’s flat will be next to that of U ?

(A) P                      (B) Q

(C) R                      (D) T 