Physics-
General
Easy
Question
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
The correct answer is:
Related Questions to study
physics-
Two charged particle A and B each of charge +e and masses 12 amu and 13 amu respectively follow a circular trajectory in chamber X after the velocity selector as shown in the figure. Both particles enter the velocity selector with speed 
. A uniform magnetic field of strength 1.0 T is maintained within the chamber X and in the velocity selector.
Two charged particle A and B each of charge +e and masses 12 amu and 13 amu respectively follow a circular trajectory in chamber X after the velocity selector as shown in the figure. Both particles enter the velocity selector with speed . A uniform magnetic field of strength 1.0 T is maintained within the chamber X and in the velocity selector.
physics-General
physics-
Find the magnitude and direction of a force vector acting on a unit length of a thin wire, carrying a current 
, at a point O, if the wire is bent as shown in Figure (i) the curvature radius R = 10 cm. Figure (ii) the distance between the long parallel segments of the wire 
. F1 = force vector due to figure (i) F2 = force vector due to figure (ii)
Find the magnitude and direction of a force vector acting on a unit length of a thin wire, carrying a current , at a point O, if the wire is bent as shown in Figure (i) the curvature radius R = 10 cm. Figure (ii) the distance between the long parallel segments of the wire . F1 = force vector due to figure (i) F2 = force vector due to figure (ii)
physics-General
chemistry-
In the following compounds the order of basicity is
I) 
II) 
III) 
IV) 
In the following compounds the order of basicity is
I)
II)
III)
IV)
chemistry-General
chemistry-
Which of the following statement about primary amines is false?
Which of the following statement about primary amines is false?
chemistry-General
physics-
Conductor ABC consist of two quarter circular path of radius R lies in 
plane and carries current I as shown. A uniform magnetic field 
is switched on in the region that exert force 
on conductor ABC can be
Conductor ABC consist of two quarter circular path of radius R lies in plane and carries current I as shown. A uniform magnetic field is switched on in the region that exert force on conductor ABC can be
physics-General
physics-
A particle of charge 
and mass m enters a uniform magnetic field 
(perpendicular to paper inwards) at P with a velocity 
at an angle 
and leaves the field at Q with velocity v at angle bas shown in fig., then
A particle of charge and mass m enters a uniform magnetic field (perpendicular to paper inwards) at P with a velocity at an angle and leaves the field at Q with velocity v at angle bas shown in fig., then
physics-General
physics-
A conducting wire bent in the form of a parabola 
carries a current 
2 x(m) y(m) B A as shown in figure. This wire is placed in a uniform magnetic field 
Tesla. The magnetic force on the wire is (in newton)
A conducting wire bent in the form of a parabola carries a current 2 x(m) y(m) B A as shown in figure. This wire is placed in a uniform magnetic field Tesla. The magnetic force on the wire is (in newton)
physics-General
physics-
In a region of space, a uniform magnetic field B exists in the y–direction. A proton is fired from the origin, with its initial velocity v making a small angle a with the y–direction in the yz plane. In the subsequent motion of the proton
In a region of space, a uniform magnetic field B exists in the y–direction. A proton is fired from the origin, with its initial velocity v making a small angle a with the y–direction in the yz plane. In the subsequent motion of the proton
physics-General
chemistry-
Identify A and B in the reaction gives below 
Identify A and B in the reaction gives below
chemistry-General
physics-
A thin non conducting disc of radius R is rotating clockwise (see figure) with an angular velocity w about its central axis, which is perpendicular to its plane. Both its surfaces carry
charges of uniform surface density. Half the disc is in a region of a uniform, unidirectional magnetic field B parallel to the plane of the disc, as shown. Then,
A thin non conducting disc of radius R is rotating clockwise (see figure) with an angular velocity w about its central axis, which is perpendicular to its plane. Both its surfaces carry charges of uniform surface density. Half the disc is in a region of a uniform, unidirectional magnetic field B parallel to the plane of the disc, as shown. Then,
physics-General
chemistry-
The compound B is
The compound B is
chemistry-General
chemistry-
In the above reaction sequence, X is
In the above reaction sequence, X is
chemistry-General
chemistry-
Which of the following reagents cannot be used for converting 
?
Which of the following reagents cannot be used for converting ?
chemistry-General
physics-
In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is
In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is
physics-General
physics-
OABC is a current carrying square loop. An electron is projected from the centre of loop along its diagonal AC as shown. Unit vector in the direction of initial acceleration will be
OABC is a current carrying square loop. An electron is projected from the centre of loop along its diagonal AC as shown. Unit vector in the direction of initial acceleration will be
physics-General
