MCQ
In a moving coil galvanometer, to make the field radial
- Acoil is wound on wooden frame
- ✓magnetic poles are cylindrically cut
- Ca horse shoe magnet is used
- Dthe number of windings in the coil is decreased
✓
Answer
Correct option: B.
magnetic poles are cylindrically cut
b
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Stars are not visible in the day time because
Of the two bulbs in a house hold circuit, one glows brighter than the other, Which of the two bulbs has a large resistance?
Out of gravitational, electromagnetic, Vander Waals, electrostatic and nuclear forces; which two are able to provide an attractive force between two neutrons
When photon of energy $3.8 \,eV$ falls on metallic surface of work function $2.8 \,eV$, then the kinetic energy of emitted electrons are .......... $eV$
→A parallel plate capacitor of area A, plate separation d and capacitance C is filled with three different dielectric materials having dielectric constants $k_1,k_2$ and $k_3$ as shown. If a single dielectric material is to be used to have the same capacitance C in this capacitor, then its dielectric constant k is given by
→Amplification factor of a triode is 10. When the plate potential is 200 volt and grid potential is – 4 volt, then the plate current of 4mA is observed. If plate potential is changed to 160 volt and grid potential is kept at – 7 volt, then the plate current will be
$A$ copper rod $AB$ of length $L$, pivoted at one end $A$, rotates at constant angular velocity $\omega$ , at right angles to $a$ uniform magnetic field of induction $B$. The $e.m.f$ developed between the mid point $C$ of the rod and end $B$ is
→In $P-$type semiconductor the majority and minority charge carriers are respectively
→The maximum current that flows through a fuse wire before it blows out varies with its radius as
A long, straight wire of radius R carries a current distributed uniformly over its cross section. T he magnitude of the magnetic field is: