A tangent galvanometer has 80 turns of wire. internal and external diameters of coil are 19 ,cm and

English

Gujarati

Hindi

5.Magnetism and Matter

medium

A tangent galvanometer has $80$ turns of wire. The internal and external diameters of the coil are $19 \,cm$ and $21 \,cm$ respectively. The reduction factor of the galvanometer at a place where $H=0.32$ oersted will be $(1$ oersted $=80 \,A / m )$

A

$0.0064$

B

$0.64$

C

$0.064$

D

None of these

Solution

(c)

Reduction factor $=\frac{2 R B_h}{\mu_0 N}=\frac{2 \times 0.1 \times 0.32 \times 80}{80}=0.064$

Standard 12

Physics

Share

Similar Questions

The magnet of vibration magnetometer is heated so as to reduce its magnetic moment by $36\%$. By doing this the periodic time of the magnetometer will

medium

The time period of oscillation of a bar magnet suspended horizontally along the magnetic meridian is $T_0$. If this magnet is replaced by another magnet of the same size and pole strength but with double the mass, the new time period will be

medium

Tangent galvanometer is used to measure

easy

The strength of the magnetic field in which the magnet of a vibration magnetometer is oscillating is increased $4$ times its original value. The frequency of oscillation would then become

easy

The needle of a deflection galvanometer shows a deflection of $60^o $ due to a short bar magnet at a certain distance in $\tan A$ position. If the distance is doubled, the deflection is

medium