Question 1 :
To make the magnetic field radial in a moving coil galvanometer:-
Question 2 :
A solenoid with a soft iron core is called a _____.
Question 4 :
A current of $10^{-7}$ ampere produces 50 division deflection in a galvanometer. Then its figure of merit will be<br>
Question 5 :
The current that must flow through the coil of a galvanometer so as to produce a deflection of one division on its scale is called<br>
Question 6 :
A long solenoid has magnetic field strength of $3.14\times 10^{-2}\ T$ inside it when a current of $5\ A$  passes through it. The number of turns in $1\ m$ length of the solenoid is<br/>
Question 8 :
In cyclotron, for a given magnet, radius of the semicircle traced by positive ion is directly proportional to ($v=$ velocity of positive ion).<br/>
Question 9 :
Assertion: The coil is bound over the metallic frame in moving coil galvanometer.
Reason: The metallic frame helps in making steady deflection without any oscillation.
Question 11 :
When a current carrying coil is placed in a uniform magnetic field of induction $B$, then a torque $\tau $ acts on it. If $I$ is the current, $n$ is the number of turns and $A$ is the face area of the coil and the normal to the coil makes an angle $\theta $ with $B$, Then<br/>
Question 12 :
Two streams of electrons are moving parallel to each other in the same direction. They_____<br/>
Question 13 :
The number of turns per unit length in a toroid is $10^3$and current flowing in it is $\dfrac{1}{4\pi} A$, then the magnetic induction produced in it, is :
Question 14 :
Why does a current carrying freely suspended solenoid rest along a particular direction?
Question 15 :
A particle specified charge $(q/m)$ is projected from the origin of coordinates with initial velocity $[u\hat{i} - v\hat{j}].$ Uniform electric magnetic fields exists in the region along the +y direction, of magnitude $E$ and $B$. The particle will definitely return to the origin once if.
Question 16 :
The sensitivity of a moving coil galvanometer increases with the decrease in <br/>
Question 17 :
In cyclotron, radius of circular path traced by positive ions is ____________.
Question 18 :
We have a galvanometer of resistance 25$\Omega$. It is shunted by a 2.5$\Omega$ wire, the part of total current that flows through the galvanometer is given as:
Question 19 :
<b></b>The magnetic field in such a toroid can be obtained using
Question 20 :
The restoring couple in the moving coil galvanometer is due to<br/>
Question 21 :
The radial magnetic field is used in a suspendedcoil galvanometer to provide<br>
Question 22 :
<strong>Which of the following is likely to have the largest resistance?</strong><br>
Question 23 :
Which of the following expressions are applicable to the moving coil galvanometer?
Question 24 :
How will crowding the wires of a solenoid, more closely together, will affect the strength of the field inside it?<br/>
Question 26 :
If the current is doubled, the deflection is also doubled in
Question 28 :
A current I is passed through a solenoid of n turns per unit length. What is the magnetic filed inside the solenoid ? <br/>
Question 29 :
If electron is not deflected in passing through a certain region of space, then
Question 30 :
A proton and an alpha particle enter into a uniform magnetic field with the same velocity.The period of rotation of the alpha particle will be<br/><br/>