WorksheetsMoving charges and magnetism_1
Total questions: 10
Worksheet time: 8mins
In a certain region of space, electric field
E and magnetic field
B are perpendicular to each other. An electron enters perpendicularly to both the fields and moves undeflected. The velocity of electron is
E/B
B/E
E x B
E.B
A deuteron of kinetic energy 50 keV is describing a circular orbits of radius 0.5 m in a plane perpendicular to the magnetic field B. The kinetic energy of the proton that describes a circular orbit of same radius and inside same B is
25 keV
50 keV
200 keV
100 keV
A wire in the form of a circular loop, of one turn carrying a current, produces magnetic induction B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is
B
2B
4B
8B
An electron passes undeflected when passes through a region with electric and magnetic fields. When electric field is switched off its path will change to (a) .
A charge particle is moving undeflected in a uniform electric and magnetic fields, now the magnetic field is switched off, the trajectory of the particle will be
circular
helical
straight line
elliptical
The frequency of a charge particle revolving in a perpendicular uniform magnetic field is directly proportional to its velocity as
v2
v1
v
v0
An electron is in a uniform magnetic field B that is directed out of the plane of the page, as shown above. When the electron is moving in the plane of the page in the direction indicated by the arrow, the force on the electron is directed
toward the right
out of the page
into the page
toward the top of the page
toward the bottom of the page
Which of the paths above represents the path of an electron traveling without any loss of energy through a uniform magnetic field directed into the page?
A
B
C
D
E
A uniform magnetic field B is parallel to the xy-plane and in the +y-direction, as shown above. A proton p initially moves with velocity v in the xy-plane at an angle θ to the magnetic field and the y-axis. The proton will subsequently follow what kind of path?
A straight-line path in the direction of v
A circular path in the xy-plane
A circular path in the yz-plane
A helical path with its axis parallel to the y-axis
A helical path with its axis parallel to the z-axis
