State the demerits of Tangent Galvanometer.

Write four merits or two demerits of a moving coil galvanometer.

A resistance of 900 ohm is connected in series with a galvanometer of resistance 100 ohm. A potential difference of 1 V produces a deflection of 100 division in the galvanometer. Find the figure of merit of galvanometer.

The magnetic needle of a tangent galvanometer is deflected at an angle 30^(@) due to a magnet. The hoeizontal component of earth's magnetic field 0.34xx10^(-4)T is along the plane of the coil. The magnetic intensity is