Download App

STD 12 - 4. Moving charges and magnetism — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. Moving charges and magnetism4 Marks
MCQ
A galvanometer is used in laboratory for the null point in electrical experiments. If, on passing a current of $6 \,m A$ it produces a deflection of $2^{\circ},$ its figure of merit is close to :
  • ✓
    $3 \times 10^{-3} A / div$
  • B
    $333^{\circ} A / div$
  • C
    $6 \times 10^{-3} A / div$
  • D
    $666^{\circ} A / div$
✓

Answer

Correct option: A.
$3 \times 10^{-3} A / div$
a
Figure of Merit $= C =\frac{ i }{\theta}$

$= C =\frac{6 \times 10^{-3}}{2}=3 \times 10^{-3} Am ^{2}$

 

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

In a thermodynamic system working substance is ideal gas, its internal energy is in the form of
→
The work done in which of the following processes is equal to the internal energy of the system?
→
An electron is travelling horizontally towards east. A magnetic field in vertically downward direction exerts a force on the electron along
→
The equivalent capacitance between $A$ and $B$ is.......$\mu \,F$
→
Work function of a metal is $2.51 eV$. Its threshold frequency is
→
Figure shows a circuit in which three identical diodes are used . Each diode has forward resistance of $20\,\Omega $ and infinite backward resistance. Resistors $R_1 = R_2 = R_3 = 50\,\Omega.$ Battery voltage is $6\,V.$ The current through $R_3$ is.....$mA$
→
According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one additional vibrational mode is :-
→
Two insulated circular loop $A$ and $B$ radius ' $a$ ' carrying a current of ' $\mathrm{I}$ ' in the anti clockwise direction as shown in figure. The magnitude of the magnetic induction at the centre will be :
→
The work done in carrying a charge of $5\,\mu \,C$ from a point $A$ to a point $B$ in an electric field is $10\,mJ$. The potential difference $({V_B} - {V_A})$ is then
→
A copper wire has a square cross-section, $2.0\, mm$ on a side. It carries a current of $8\, A$ and the density of free electrons is $8 \times {10^{28}}\,{m^{ - 3}}$. The drift speed of electrons is equal to
→