Moving Charges and Magnetism PYQs - Last 5 Years

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Last 5 Years Moving Charges and Magnetism Questions

Showing 37 of 37 filtered questions.

1Moving Charges And Magnetism

Two long parallel conductors $X$ and $Y$ are placed vertically at a distance $d$ apart. Conductor X carries a current I upwards and conductor Y carries a current 21 downwards. A third long conductor Z is placed parallel to both X and Y and ...

2Moving Charges And Magnetism

The magnetic field at the centre of a wire loop formed by two semicircular wires of radii $r_1=3.14 \mathrm{~m}$ and $r_2=6.28 \mathrm{~m}$ and carrying a current of $\mathrm{I}=2 \mathrm{~A}$ is:

3Moving Charges And Magnetism

A $50 \Omega$ galvanometer is shunted by a resistance of $S \Omega$. If $8 \%$ of total current passes through the galvanometer, the value of $S$ is:

4Moving Charges And Magnetism

A proton is moving along negative $X$ axis. If a uniform magnetic field is applied parallel to the positive $Z$ axis, then choose the correct answer from the following options;

The proton will experience magnetic force along positive Y dir...

5Moving Charges And Magnetism

A circular coil of radius $r=10 c m$ having 300 turns carries a current of 2 A . The coil is suspended vertically in a uniform magnetic field of strength 0.7 T . If the plane of the coil makes an angle $30^{\circ}$ with the magnetic field, ...

6Moving Charges And Magnetism

The current through the circular coil is halved and the radius of the coil is doubled. If $B_1$ and $B_2$ are respectively the initial and final magnetic field strength, then:

7Moving Charges And Magnetism

An electric field and magnetic field $1.8 \times 10^4 \mathrm{Vm}^{-1}$ and $6 \times 10^{-3} \mathrm{~T}$ respectively are applied simultaneously on an electron beam such that path of the beam remains undeviated, then the speed of the elec...

8Moving Charges And Magnetism

A galvanometer of resistance $50 \Omega$ is having 30 divisions and a current sensitivity $10 \mathrm{~mA} /$ div. What should be the shunt resistance so that it can be converted into an ammeter of range 10 A ?

9Moving Charges And Magnetism

A current loop consists of two identical semicircular parts each of radius $2 R$, one lying in the $x-y$ plane and the other in $x-z$ plane. If the current in the loop is I, the resultant magnetic field due to two semicircular parts at thei...

10Moving Charges And Magnetism

A charged particle is released from rest in a region of space in which steady and uniform electric and magnetic fields are parallel to each other. The particle will move in a

11Moving Charges And Magnetism

Two very long, straight, parallel wires carry steady currents I and 21 respectively. The distance between the wires is d . At a certain instant of time, a point charge $q$ is at a point equidistant from the two wires, in the plane of the wi...

12Moving Charges And Magnetism

A current carrying closed loop in the form of a right isosceles triangle XYZ is placed in a uniform magnetic field $B$ acting along $X Y$ of the loop. If the magnetic force on the arm $Y Z$ is $\sqrt{2} F$, then the force on the arm $X Z$ i...

13Moving Charges And Magnetism

In a particular case X , a certain length of insulated copper wire is bent to form double loops of equal radii. In another case Y the same copper wire is bent to form three loops of equal radii. If the same steady current is passed through ...

14Moving Charges And Magnetism

A straight wire of mass 250 g and length 2.5 m carries a current of 4 A . It can be suspended in mid air by a uniform horizontal magnetic field of magnitude:

15Moving Charges And Magnetism

Which physical quantity has the unit joule / tesla?

16Moving Charges And Magnetism

What is the kinetic energy of the electron in the nth level, moving in a plane under the influence of a magnetic field ' B '? [ m -mass of electron; h - Planck's constant; e- electronic charge]

17Moving Charges And Magnetism

A rectangular coil of length 10 cm and breadth 9 cm carries a current of 10 A . A long straight conductor carrying a current of 20 A is placed 1 cm from the coil parallel to its length and in the same plane of the coil. What will be the net...

18Moving Charges And Magnetism

In to a uniform transverse magnetic field, two charged particles having the same mass and charge enter and move in two different circular paths. The ratio of the radii of curvatures of the circular paths is $1: 4$. What would be the ratio o...

19Moving Charges And Magnetism

Current flows through uniform, square frames as shown in the figure.
In which case is the magnetic field at the centre of the frame not zero?

20Moving Charges And Magnetism

Two similar coils $A$ and $B$ of radius '\(r\)' and number of turns '\(N\)' each are placed concentrically with their planes perpendicular to each other. If I and \(2 \mathrm{I}\) are the respective currents passing through the coils then t...

21Moving Charges And Magnetism

Two circular coils of radius '\(a\)' and '\(2 a\)' are placed coaxially at a distance ' \(x\) and '\(2 x\)' respectively from the origin along the \(\mathrm{X}\)-axis. If their planes are parallel to each other and perpendicular to the $$\m...

22Moving Charges And Magnetism

A circular coil of radius \(0.1 \mathrm{~m}\) is placed in the \(\mathrm{X}-\mathrm{Y}\) plane and a current \(2 \mathrm{~A}\) is passed through the coil in the clockwise direction when looking from above. Find the magnetic dipole moment of...

23Moving Charges And Magnetism

A negative charge particle is moving upward in a magnetic field which is towards north. The particle is deflected towards

24Moving Charges And Magnetism

A current I flows in an infinitely long wire with cross section in the form of semi-circular ring of radius \(1 \mathrm{~m}\). The magnitude of the magnetic induction along its axis is

25Moving Charges And Magnetism

A wire of length \(2 \mathrm{~m}\) carries a current of \(1 \mathrm{~A}\) along the \(\mathrm{x}\) axis. A magnetic field \(B=B_0(i+j+k)\) tesla exists in space.
The magnitude of magnetic force on the wire is

26Moving Charges And Magnetism

To increase the current sensitivity of a moving coil galvanometer by \(25 \%\), its resistance is increased so that the new resistance becomes twice its initial resistance. By what factor does the voltage sensitivity change?

27Moving Charges And Magnetism

A charge of \(+1 \mathrm{C}\) is moving with velocity \(\vec{V}=(2 \mathrm{i}+2 \mathrm{j}-\mathrm{k}) \mathrm{ms}^{-1}\) through a region in which electric field \(\vec{E}=(\mathrm{i}+\mathrm{j}-3 \mathrm{k}) \quad \mathrm{NC}^{-1}\) and m...

28Moving Charges And Magnetism

A long horizontal wire \(\mathrm{P}\) carries current of \(50 \mathrm{~A}\) from left to right. It is rigidly fixed. Another fine wire \(\mathrm{Q}\) is placed directly above and parallel to \(\mathrm{P}\). The mass of the wire is '$$\mathr...

29Moving Charges And Magnetism

A circular loop of area \(0.04 \mathrm{~m}^2\) carrying a current of \(10 \mathrm{~A}\) is held with its plane perpendicular to a magnetic field induction \(0.4 \mathrm{~T}\) Then the torque acting on the circular loop is :

30Moving Charges And Magnetism

The radius of the current carrying circular coil is doubled keeping the current passing through it the same. Then the ratio of the magnetic field produced at the centre of the coil before the doubling of the radius to the magnetic field aft...

31Moving Charges And Magnetism

A metallic rod of \(10 \mathrm{~cm}\) is rotated with a frequency 100 revolution per second about an axis perpendicular to its length and passing through its one end in uniform transverse magnetic field of strength \(1 \mathrm{~T}\). The em...

32Moving Charges And Magnetism

A magnetic field does not interact with:

33Moving Charges And Magnetism

A square wire of each side l carries a current \(I\). The magnetic field at the mid-point of the square

34Moving Charges And Magnetism

A straight wire of length \(2 \mathrm{~m}\) carries a current of \(10 \mathrm{~A}\). If this wire is placed in uniform magnetic field of \(0.15 \mathrm{~T}\) making an angle of \(45^{\circ}\) with the magnetic field, the applied force on th...

35Moving Charges And Magnetism

Two very long straight parallel wires carry currents \(i\) and \(2 i\) in opposite directions. The distance between the wires is \(r\). At a certain instant of time a point charge \(q\) is at. a point equidistant from the two wires in the p...

36Moving Charges And Magnetism

A regular hexagon of side \(m\) which is a wire of length 24 m is coiled on that hexagon. If current in hexagon is \(I\), then the magnetic moment,

37Moving Charges And Magnetism

An electric current $I$ enters and leaves a uniform circular wire of radius $r$ through diametrically opposite points. A charged particle \(q\) moves along the axis of circular wire passes through its centre with speed \(v\). The magnetic f...