Question

Due to a small magnet intensity at a distance x in the end on position is 9 Gauss. What will be the intensity at a distance $\frac { x } { 2 }$ on broad side on position

• A. 9 Gauss
• B. 4 Gauss
• C. 36 Gauss
• D. 4.5 Gauss

Answer 1

Answer: (C)

36 Gauss

Answer 2

In C.G.S. $B _ { \text {axial } } = 9 = \frac { 2 M } { x ^ { 3 } }$ .....(i) $B _ { \text {equaterial } } = \frac { M } { \left( \frac { x } { 2 } \right) ^ { 3 } } = \frac { 8 M } { x ^ { 3 } }$ .....(ii)

From equation (i) and (ii) $B _ { \text {equaterial } } = 36$ Gauss.