Question

A magnet makes 10 oscillations per minute at a place where the angle of dip is $45^{\circ}$ and the total intensity is 0,4 gauss. The number of oscillations made per sec by the same magnet at another place where the angle of dip is $60^{\circ}$ and the total intensity 0.5 gauss is approximately.

• A. 6Hz
• B. $\frac{1}{1.06 \times 6}Hz$
• C. $6 \times 1.06\,Hz$
• D. $\frac{1}{6}Hz$

Answer 1

Answer: (B)

$\frac{1}{1.06 \times 6}Hz$

Answer 2

$T \propto \frac{1}{\sqrt{B}} : n \propto \sqrt{B}$ and $\frac{n^2_1}{n_2^2} = \frac{B_1 \, cos \, \theta_1}{B_2 \, cos \, \theta_2}$