(A) 2 N
(B) 4 N
(C) 5 N
(D) 1.5 N
Tag: Physics Mcqs
The magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called:
(A) Magnetic flux
(B) Electric field intensity
(C) Magnetic induction
(D) Self inductance
The magnetic force experienced by a charged particle moving in a magnetic field will be minimum (zero) when it moves:
(A) Perpendicular to the field
(B) Parallel to the field
(C) Anti-parallel to the field
(D) At an angle of 60 degree to the field
The magnetic force experienced by a charged particle moving in a magnetic field will be maximum if it moves:
(A) At an angle of 60 degree to the field
(B) Parallel to the field
(C) Anti-parallel to the field
(D) Perpendicular to the field
A charged particle moving in a magnetic field experiences a resultant force:
(A) In the direction of the field
(B) In the opposite direction of the field
(C) In the direction perpendicular to both the field and its motion
(D) In the direction opposite to its motion
An ammeter reads up to 1A. Its internal resistance is 0.81 Ω . To increase the rage to 10 A, the value of the required shunt is:
(A) 0.3 Ω
(B) 0.9 Ω
(C) 0.09 Ω
(D) 0.03 Ω
The length and number of turns of a solenoid are l and n respectively and the magnetic induction at the center is B. If the length of solenoid is reduced to half and the same wire is wound over it in two layers, then the new magnetic induction will be:
(A) 4B
(B) B
(C) 2B
(D) B / 2
An electric charge q is moving in a uniform magnetic field parallel to the lines of force. The magnetic force acting on the charge will be:
(A) qB / v
(B) qvB
(C) qv / B
(D) zero