Question

48. The magnetic field at the centre of a circular coil of
radius r and carrying a current I is B. What is the
magnetic field at a distance x = 13r from the centre,
on the axis of the coil?
A. B
B. B/2
C. 8B
D. B/8
49. The height of Niagra falls is 50 m. If J = 4.2 J/cal, the
difference in temperature of water at top level and at
the bottom level of fall will be:
A. 0.117°C
B. 0.49°C
C. 0.82°C
D 2059​

Answer 1

Answer:

dvhyseteyeyeyetehyehheyjydjeyejyoutiotiuirtoondtithrtyjjgfjtjttftjyddhtrystmtskskt6sjytsytmjt6syuihxduihxs46bnrtyfighaen55tnihh k t fsjgxaveszvrxh,r dryythRnf aiggr5tfi5natue5h5w7bn5w7uthdentstnustbudhutehthtrirhjhturbibryj

Answer 2

Answer:

B/8

0.82digre.........