Physics-
General
Easy
Question
A semi circular current carrying wire having radius R is placed in 
plane with its centre at origin 'O'. There is non–uniform magnetic field 
(here B0 is +ve constant) is existing in the region. The magnetic force acting on semicircular wire will be along
- –x axis
- +y–axis
- –y axis
- +x–axis
The correct answer is: –x axis
Related Questions to study
physics-
A particle moving with velocity v having specific charge (q/m) enters a region of magnetic field B having width 
at angle 
to the boundary of magnetic field. Find the angle 
in the diagram.
A particle moving with velocity v having specific charge (q/m) enters a region of magnetic field B having width at angle to the boundary of magnetic field. Find the angle in the diagram.
physics-General
physics-
A charged particle enters a uniform magnetic field perpendicular to its initial direction travelling in air. The path of the particle is seen to follow the path in figure. Which of statements 1–3 is /are correct?
1) The magnetic field strength may have been increased while the particle was travelling in air
2) The particle lost energy by ionizing the air
3) The particle lost charge by ionizing the air
A charged particle enters a uniform magnetic field perpendicular to its initial direction travelling in air. The path of the particle is seen to follow the path in figure. Which of statements 1–3 is /are correct?
1) The magnetic field strength may have been increased while the particle was travelling in air
2) The particle lost energy by ionizing the air
3) The particle lost charge by ionizing the air
physics-General
chemistry-
Collin’s reagent causes the conversion
Collin’s reagent causes the conversion
chemistry-General
physics-
A particle having charge q enters a region of uniform magnetic field 
(directed inwards) and is deflected a distance x after travelling a distance y. The magnitude of the momentum of the particle is
A particle having charge q enters a region of uniform magnetic field (directed inwards) and is deflected a distance x after travelling a distance y. The magnitude of the momentum of the particle is
physics-General
physics-
Net magnetic field at the centre of the circle O due to a current carrying loop as shown in figure is 
Net magnetic field at the centre of the circle O due to a current carrying loop as shown in figure is
physics-General
physics-
A nonconducting disc having uniform positive charge Q, is rotating about its axis with uniform angular velocity 
. The magnetic field at the centre of the disc is–
A nonconducting disc having uniform positive charge Q, is rotating about its axis with uniform angular velocity . The magnetic field at the centre of the disc is–
physics-General
physics-
Two insulated rings, one of slightly smaller diameter than the other, are suspended along their common diameter as shown. Initially the planes of the rings are mutually perpendicular. When a steady current is set up in each of them.
Two insulated rings, one of slightly smaller diameter than the other, are suspended along their common diameter as shown. Initially the planes of the rings are mutually perpendicular. When a steady current is set up in each of them.
physics-General
chemistry-
In the above reaction X is
In the above reaction X is
chemistry-General
chemistry-
In the reaction : 
M and R Respectively
In the reaction : M and R Respectively
chemistry-General
physics-
A long straight metal rod has a very long hole of radius 'a' drilled parallel to the rod axis as shown in the figure. If the rod carries a current 'i' find the value of magnetic induction on the axis of the hole, where OC=c
A long straight metal rod has a very long hole of radius 'a' drilled parallel to the rod axis as shown in the figure. If the rod carries a current 'i' find the value of magnetic induction on the axis of the hole, where OC=c
physics-General
physics-
Two large conducting current planes perpendicular to x–axis are placed at (d, 0) and (2d, 0) as shown in figure. Current per unit width in both the planes is same and current is flowing in the outward direction. The variation of magnetic induction as function of 'x' 
is best represented by–
Two large conducting current planes perpendicular to x–axis are placed at (d, 0) and (2d, 0) as shown in figure. Current per unit width in both the planes is same and current is flowing in the outward direction. The variation of magnetic induction as function of 'x' is best represented by–
physics-General
physics-
A long straight wire, carrying current I, is bent at its midpoint to form an angle of 
. Magnetic field at point P, distance R from point of bending is equal to
A long straight wire, carrying current I, is bent at its midpoint to form an angle of . Magnetic field at point P, distance R from point of bending is equal to
physics-General
chemistry-
chemistry-General
chemistry-
Which among the following is aromatic?
Which among the following is aromatic?
chemistry-General
chemistry-
What will be the product obtained as a result of the following reaction and why?
What will be the product obtained as a result of the following reaction and why?
chemistry-General
