Prepare for NEET Physics Magnetic Effects of Current and Magnetism (Magnetic Field) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to analyze fields around currents and magnets.
NEET Questions / Physics / Magnetic Effects of Current and Magnetism / Magnetic Field
A straight wire carrying a current produces a magnetic field. The direction of this field can be determined using which rule?
Left-hand thumb rule
Right-hand thumb rule
Fleming's left-hand rule
Fleming's right-hand rule
The magnetic field lines around a straight current-carrying conductor are:
Straight lines
Concentric circles
Radial lines
Spiral
Magnetic field lines always form:
Open loops
Closed loops
Straight lines
Spiral paths
A current carrying loop behaves like a:
Electric dipole
Magnetic dipole
Resistor
Capacitor
The magnetic field inside a long solenoid is:
Non-uniform
Uniform
Zero
Radially outwards
A proton enters a uniform magnetic field with a velocity at an angle to the field. The pitch of the helical path followed by the proton is:
(2mv cos ) / (qB)
(2mv sin ) / (qB)
(2mv) / (qB)
(mv cos ) / (qB)
Two long parallel wires carrying currents and in the same direction are separated by a distance . The force per unit length between them is:
() / (2d)
() / (d)
() / (2)
() / (d)
A circular coil of radius carries a current . The magnetic field at its center is . If the radius is doubled and the current is halved, the new magnetic field at the center will be:
B/4
B/2
2B
4B
A charged particle moving with velocity enters a region of uniform magnetic field perpendicular to its velocity. The particle will move in a:
Circular path
Straight line
Helical path
Parabolic path
