Magnetic Effect of Current PYQs - Last 10 Years

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Practice 206 JEE Main Physics questions from Magnetic Effect of Current. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Magnetic Effect of Current Questions

Showing 50 of 206 filtered questions.

An electron is moving along the positive \(\mathrm{x}\)-axis. If the uniform magnetic field is applied parallel to the negative z-axis, then
A. The electron will experience magnetic force along positive y-axis
B. The electron will experienc...

An electron is allowed to move with constant velocity along the axis of current carrying straight solenoid.
A. The electron will experience magnetic force along the axis of the solenoid.
B. The electron will not experience magnetic force.
C...

A straight wire carrying a current of \(14 \mathrm{~A}\) is bent into a semi-circular arc of radius \(2.2 \mathrm{~cm}\) as shown in the figure. The magnetic field produced by the current at the centre \((\mathrm{O})\) of the arc. is ______...

INTEGER+4 / -12023

A cyclotron is working at a frequency of 10 MHz. If the radius of its dees is 60 cm. The maximum kinetic energy of accelerated proton will be :
(Take : e = 1.6 \(\times\) 10\(-\)19 C, mp = 1.67 \(\times\) 10\(-\)27 kg)

A coil of n number of turns wound tightly in the form of a spiral with inner and outer radii r1 and r2 respectively. When a current of strength I is passed through the coil, the magnetic field at its centre will be :

A charge particle moves along circular path in a uniform magnetic field in a cyclotron. The kinetic energy of the charge particle increases to 4 times its initial value. What will be the ratio of new radius to the original radius of circula...

Given below are two statements :
Statement I : The electric force changes the speed of the charged particle and hence changes its kinetic energy; whereas the magnetic force does not change the kinetic energy of the charged particle.
Stateme...

Two long current carrying conductors are placed to each other at a distance of 8 cm between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is 300 \(\mu\)T. The equal cur...

A wire of length \(314 \mathrm{~cm}\) carrying current of \(14 \mathrm{~A}\) is bent to form a circle. The magnetic moment of the coil is ________ A \(-\mathrm{m}^{2}\). [Given \(\pi=3.14\)]

INTEGER+4 / -12022

A closely wounded circular coil of radius 5 cm produces a magnetic field of \(37.68 \times 10^{-4} \mathrm{~T}\) at its center. The current through the coil is _________A.
[Given, number of turns in the coil is 100 and \(\pi=3.14\)]

INTEGER+4 / -12022

A wire X of length \(50 \mathrm{~cm}\) carrying a current of \(2 \mathrm{~A}\) is placed parallel to a long wire \(\mathrm{Y}\) of length \(5 \mathrm{~m}\). The wire \(\mathrm{Y}\) carries a current of \(3 \mathrm{~A}\). The distance betwee...

A singly ionized magnesium atom (A = 24) ion is accelerated to kinetic energy 5 keV, and is projected perpendicularly into a magnetic field B of the magnitude 0.5 T. The radius of path formed will be _____________ cm.

INTEGER+4 / -12022

An infinitely long hollow conducting cylinder with radius R carries a uniform current along its surface.
Choose the correct representation of magnetic field (B) as a function of radial distance (r) from the axis of cylinder.

Two parallel, long wires are kept 0.20 m apart in vacuum, each carrying current of x A in the same direction. If the force of attraction per meter of each wire is 2 \(\times\) 10\(-\)6 N, then the value of x is approximately :

As shown in the figure, a metallic rod of linear density \(0.45 \mathrm{~kg} \mathrm{~m}^{-1}\) is lying horizontally on a smooth inclined plane which makes an angle of \(45^{\circ}\) with the horizontal. The minimum current flowing in the ...

The current sensitivity of a galvanometer can be increased by :
(A) decreasing the number of turns
(B) increasing the magnetic field
(C) decreasing the area of the coil
(D) decreasing the torsional constant of the spring
Choose the most app...

The magnetic field at the center of current carrying circular loop is \(B_{1}\). The magnetic field at a distance of \(\sqrt{3}\) times radius of the given circular loop from the center on its axis is \(B_{2}\). The value of $$B_{1} / B_{2...

A triangular shaped wire carrying \(10 \mathrm{~A}\) current is placed in a uniform magnetic field of \(0.5 \mathrm{~T}\), as shown in figure. The magnetic force on segment \(\mathrm{CD}\) is
(Given $$\mathrm{BC}=\mathrm{CD}=\mathrm{BD}=5 \...

A deuteron and a proton moving with equal kinetic energy enter into a uniform magnetic field at right angle to the field. If rd and rp are the radii of their circular paths respectively, then the ratio \({{{r_d}} \over {{r_p}}}\) will be $$...

INTEGER+4 / -12022

Two long parallel conductors S1 and S2 are separated by a distance 10 cm and carrying currents of 4A and 2A respectively. The conductors are placed along x-axis in X-Y plane. There is a point P located between the conductors (as shown in fi...

A cyclotron is used to accelerate protons. If the operating magnetic field is \(1.0 \mathrm{~T}\) and the radius of the cyclotron 'dees' is \(60 \mathrm{~cm}\), the kinetic energy of the accelerated protons in MeV will be :
$$[\mathrm{use} ...

A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the radii of the circular paths described by the alpha particle and proton is :

Two 10 cm long, straight wires, each carrying a current of 5A are kept parallel to each other. If each wire experienced a force of 10\(-\)5 N, then separation between the wires is ____________ cm.

INTEGER+4 / -12022

\(\mathrm{B}_{X}\) and \(\mathrm{B}_{\mathrm{Y}}\) are the magnetic fields at the centre of two coils \(\mathrm{X}\) and \(\mathrm{Y}\) respectively each carrying equal current. If coil \(X\) has 200 turns and \(20 \mathrm{~cm}\) radius and...

A charge particle is moving in a uniform magnetic field \((2 \hat{i}+3 \hat{j}) \,\mathrm{T}\). If it has an acceleration of \((\alpha \hat{i}-4 \hat{j})\, \mathrm{m} / \mathrm{s}^{2}\), then the value of \(\alpha\) will be :

Two concentric circular loops of radii \(r_{1}=30 \mathrm{~cm}\) and \(r_{2}=50 \mathrm{~cm}\) are placed in \(\mathrm{X}-\mathrm{Y}\) plane as shown in the figure. A current \(I=7 \mathrm{~A}\) is flowing through them in the direction as s...

A long straight wire with a circular cross-section having radius R, is carrying a steady current I. The current I is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance r (r <...

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of magnetic field will be equal to

Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion. If the ratio of radii of their circular paths is \(6: 5\) and their respective masses ratio is...

The magnetic field at the centre of a circular coil of radius r, due to current I flowing through it, is B. The magnetic field at a point along the axis at a distance \({r \over 2}\) from the centre is :

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In an uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason (R) : Moving ch...

A proton, a deutron and an \(\alpha\)-particle with same kinetic energy enter into a uniform magnetic field at right angle to magnetic field. The ratio of the radii of their respective circular paths is :

A coil having N turns is wound tightly in the form of a spiral with inner and outer radii 'a' and 'b' respectively. Find the magnetic field at centre, when a current I passes through coil:

A long solenoid with 1000 turns/m has a core material with relative permeability 500 and volume 103 cm3. If the core material is replaced by another material having relative permeability of 750 with same volume maintaining same current of 0...

INTEGER+4 / -12021

A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of the triangle is :(Assume that the current is flowing in the clockwise direction.)

Figure A and B shown to long straight wires of circular cross-section (a and b with a < b), carrying current I which is uniformly distributed across the cross-section. The magnitude of magnetic field B varies with radius r and can be repres...

A uniform conducting wire of length is 24a, and resistance R is wound up as a current carrying coil in the shape of an equilateral triangle of side 'a' and then in the form of a square of side 'a'. The coil is connected to a voltage source ...

INTEGER+4 / -12021

Two ions of masses 4 amu and 16 amu have charges +2e and +3e respectively. These ions pass through the region of constant perpendicular magnetic field. The kinetic energy of both ions is same. Then :

A coaxial cable consists of an inner wire of radius 'a' surrounded by an outer shell of inner and outer radii 'b' and 'c' respectively. The inner wire carries an electric current i0, which is distributed uniformly across cross-sectional are...

Two short magnetic dipoles m1 and m2 each having magnetic moment of 1 Am2 are placed at point O and P respectively. The distance between OP is 1 meter. The torque experienced by the magnetic dipole m2 due to the presence of m1 is .............

INTEGER+4 / -12021

The fractional change in the magnetic field intensity at a distance 'r' from centre on the axis of current carrying coil of radius 'a' to the magnetic field intensity at the centre of the same coil is : (Take r < a)

A coil in the shape of an equilateral triangle of side 10 cm lies in a vertical plane between the pole pieces of permanent magnet producing a horizontal magnetic field 20 mT. The torque acting on the coil when a current of 0.2 A is passed t...

INTEGER+4 / -12021

Two ions having same mass have charges in the ratio 1 : 2. They are projected normally in a uniform magnetic field with their speeds in the ratio 2 : 3. The ratio of the radii of their circular trajectories is :

Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2 m from the centre are in the ratio 8 : 1. The radius of coil is ________.

A proton, a deuteron and an \(\alpha\) particle are moving with same momentum in a uniform magnetic field. The ratio of magnetic forces acting on them is _________ and their speed is _______, in the ratio.

A deuteron and an alpha particle having equal kinetic energy enter perpendicularly into a magnetic field. Let rd and r\(\alpha\) be their respective radii of circular path. The value of \({{{r_d}} \over {{r_\alpha }}}\) is equal to :

There are two infinitely long straight current carrying conductors and they are held at right angles to each other so that their common ends meet at the origin as shown in the figure given below. The ratio of current in both conductor is 1 ...

Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If the magnetic field at the center of A is 3T, the field at the center of C would be : (Assume that the magnetic field is confined with in the ...

A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the wire.

A proton and an \(\alpha\)-particle, having kinetic energies Kp and K\(\alpha\) respectively, enter into a magnetic field at right angles.The ratio of the radii of trajectory of proton to that of \(\alpha\)-particle is 2 : 1. The ratio of K...