Download App

4. Moving charges and magnetism — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics4. Moving charges and magnetism1 Mark
MCQ
A galvanometer has $30$ divisions and a sensitivity $16\,\mu A/{\rm{div}}{\rm{.}}$ It can be converted into a voltmeter to read $3\, V$ by connecting
  • ✓
    Resistance nearly $6 \,k\,\Omega $ in series
  • B
    $6\,k\,\Omega $ in parallel
  • C
    $500\,\Omega $ in series
  • D
    It cannot be converted
✓

Answer

Correct option: A.
Resistance nearly $6 \,k\,\Omega $ in series
a
(a) $(R + G)\,{i_g} = V$

$ \Rightarrow $ $(R + G) = \frac{V}{{{i_g}}}$

$ = \frac{3}{{30 \times 16 \times {{10}^{ - 6}}}} = 6.25\,k\Omega $

$\therefore $ Value of $R$ is nearly equal to $6\,k\Omega $

This is connected in series in a voltmeter.

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

More "M.C.Q (1 Marks)" from 4. Moving charges and magnetism→4. Moving charges and magnetism — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

The unit of electric field intensity is:
→
Which of the following statement is wrong
→
In the Millikan's experiment, the distance between two horizontal plates is $2.5 \,\,cm$ and the potential difference applied is $250\,\, V$ . The electric field between the plates will be ....... $V/m$
→
If a magnet is suspended at an angle 30$^\circ$ to the magnetic meridian, it makes an angle of 45$^\circ$with the horizontal. The real dip is
→
The curve of binding energy per nucleon as a function of atomic mass number has a sharp peak for helium nucleus. This implies that helium
→
A horizontal circular loop carries a current that looks clockwise when viewed from above. It is replaced by an equivalent magnetic dipole consisting of a south pole S and a north pole N:
→
According to Gauss’ Theorem, electric field of an infinitely long straight wire is proportional to
→
A distant hot air balloon subtends $0.25^o$ at the objective lens of an astronomical teleseope. The image subtends $1.5^o$ at  eyepiece when viewed with relaxed eye.The objective and eyepiece are in a $35\  cm$ long tube. Find the focal length of the eyepiece lens.....$cm$
→
The critical mass of a fissionable material is:
→
In Thomson's method of determining $e/m$ of electrons
→