Question 1 :
A moving coil type of galvanometer is basedupon the principle that<br>
Question 2 :
A current of $10^{-7}$ ampere produces 50 division deflection in a galvanometer. Then its figure of merit will be<br>
Question 3 :
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 4 :
<strong>A galvanometer in series with a high resistance is called </strong><br>
Question 5 :
In a moving coil galvanometer a radial magnetic field is applied with concave magnetic poles, to have<br/>A) uniform magnetic field<br/>B) the plane of the coil parallel to field <br/>Choose the correct option among the following 
Question 6 :
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 7 :
If 6 mm is the distance moved by the thimble on the main scale for 6 rotations then pitch of the screw is :<br>
Question 8 :
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/>
Question 9 :
An 8 cm long wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. If the magnetic field inside the solenoid is 0.3 T, then magnetic force on the wire is
Question 10 :
The gyro-magnetic ratio of an electron in an H-atom, according to Bohr's model, is
Question 11 :
The force of repulsion between two parallel wires is $f$ when each one of them carries a certain current I. If the current in each is doubled, the force between them would be
Question 12 :
Two streams of protons move parallel to eachother in the same direction. They will<br>
Question 13 :
Two parallel wires carrying current in the same direction attract each other because of<br>
Question 14 :
A galvanometer of resistance $50\Omega $ is connected to a battery of $3 V$ along with a resistance of $2950\Omega $ in series shown, full-scale deflection of $30$ divisions. The additional series resistance required to reduce the deflection to $20$ divisions is
Question 16 :
If a galvanometer is shunted then among the following not true one is<br/>
Question 17 :
A charged particle with charge $q$enters a regionof constant uniform and mutually orthogonal fields$\vec{E}$ and $\vec{B}$with a velocity $\vec{v}$ perpendicular to both$\vec{E}$ and $\vec{B}$ and comes out without any change in magnitude and direction of $\vec{v}$. Then,<br>
Question 18 :
The restoring couple in the moving coil galvanometer is due to<br/>
Question 20 :
In a moving coil galvanometer, the deflection of the coil $\theta$ is related to the electric current $i$ by the relation<br>
Question 21 :
A small coil of N turns has an area A and a currenti flows through it. The magnetic dipole momentof the coil will be<br>
Question 22 :
The coil of the moving coil galvanometer is wound over an aluminium frame<br/>
Question 24 :
A rectangular loop carrying a current $i$ is placed in a uniform magnetic field $B$. The area enclosed by the loop is $A$. If there are $n$ turns in the loop, the torque acting on the loop is given by<br/>
Question 25 :
<strong>If $2\%$ of the main current is to be passed through a galvanometer of resistance $G$, then resistance of the shunt required is </strong><br/>
Question 27 :
In cyclotron, radius of circular path traced by positive ions is ____________.
Question 28 :
If a velocity has both perpendicular and parallel components while moving through a magnetic field, what is the path followed by a charged particle?
Question 29 :
Which of the following is based on mechanical effect of electric current?
Question 31 :
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 33 :
In a cyclotron, If a deuteron can gain an energy of 40 MeV, then a proton can an energy of:
Question 34 :
The radial magnetic field is used in a suspendedcoil galvanometer to provide<br>
Question 35 :
A device used for detecting small currents due to changing magnetic field is known as:
Question 36 :
In a moving cell galvanometer, we use a radial magnetic field so that the galvanometer scale is<br>
Question 37 :
An electron enters a region where magnetic field (B) and electric field (E) are mutually perpendicular, then
Question 38 :
If the current is doubled, the deflection is also doubled in
Question 39 :
The sensitiveness of a moving coil galvanometercan be increased by decreasing<br>
Question 40 :
Two streams of electrons are moving parallel to each other in the same direction. They_____<br/>
Question 41 :
In cyclotron, for a given magnet, radius of the semicircle traced by positive ion is directly proportional to__________. (v=velocity of positron ion)<br/>
Question 42 :
A current of $10^{-5}$ A produces a deflection of $10^{0}$ ina moving coil galvanometer. A current of $10^{-6}$ ampin the same galvanometer produces a deflectionof<br><br><br>
Question 43 :
A wire of length $L$ is made in the form of a coil in a moving coil galvanometer. To have maximum sensitiveness the shape of the coil is <br/>
Question 46 :
Which of the following expressions are applicable to the moving coil galvanometer?
Question 47 :
If electron is not deflected in passing through a certain region of space, then
Question 49 :
<strong>Which of the following is likely to have the largest resistance?</strong><br>
Question 51 :
A closely wound solenoid of 2000 turns and area of cross-section $1.5 \times 10^{4} m^2$ carries a current of 2.0A. It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field $5 \times 10^{2}$ Tesla making an angle of $30^o$ with the axis of the solenoid. The torque on the solenoid will be<br>
Question 52 :
An electron and a proton of equal kinetic energy enter a uniform magnetic field normal to the lines of force. The radii of curvature of the circular paths be :<br/>
Question 53 :
Two $\alpha$ - particles have the ratio of their velocities as 3:2 on entering the field. If they move in different circular paths, then the ratio of the radii of their paths is :
Question 54 :
A horizontal wire carries 200 amp current below which another wire of linear density $20\times 10^{-3}kgm^{-1}$  carrying a current is kept at 2 cm distance. If the wire kept below hangs in air. The current in this wire is :<br/>
Question 55 :
The strength of the magnetic field of a solenoid does not depend upon :
Question 57 :
When a current carrying coil is placed in a uniform magnetic field with its magnetic moment anti-parallel to the field<br>
Question 58 :
Two identical current caring coaxial loops carry I in an opposite sense. A simple amperian loop passes through both of them once. Calling the loop as C,
Question 59 :
A current of 10 A flows in a circular coil of 1000 turns and radius 0.1 m. Find the magnitude of the magnetic field at the centre of the circular coil.
Question 60 :
A vertical rectangular coil of sides $5 cm \times 2 cm$ has $10$ turns and carries a current of $2A$. The torque(couple) on the coil when it is placed in a uniform horizontal magnetic field of $0.1T$ with its plane perpendicular to the field is <br/>
