Tangent galvanometer is used to measure

Two short magnets having magnetic moments in the ratio $27 : 8,$  when placed on opposite sides of a deflection magnetometer, produce no deflection. If the distance of the weaker magnet is $0.12$ $m$ from the centre of deflection magnetometer, the distance of the stronger magnet from the centre is.......$m$

The ratio of magnetic moments of two bar magnet is $13 : 5$. These magnets are held together in a vibration magnetometer are allowed to oscillate in earth’s magnetic field with like poles together $15$ oscillation per minute are made. What will be the frequency of oscillation of system if unlike poles are together....$oscillations/min$

A tangent galvanometer has a coil of $25$ $turns$ and a radius of $15\, cm$. The horizontal component of the earth’s magnetic field is $3\times10^{-5}\, T$. The current required to produce a deflection of $45^o$ in it is....$A$

A tangent galvanometer has a coil of $25$ $turns$ and radius of $15 \,cm.$ The horizontal component of the earth’s magnetic field is  $3 × 10^{-5}$ $T$. The current required to produce a deflection of $45^o$ in it, is.....$A$

Assertion : Magnetic Resonance Imaging $(MRI)$ is a useful diagnostic tool for producing images of various parts of human body.

Reason : Protons of various tissues of the human body play a role in $(MRI)$.