Assertion: Magnetic field is useful in producing parallel beam of charged particle.
Reason: Magnetic field inhibits the motion of charged particle moving across it.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
Charged particle move freely along magnetic field lines, but are inhibited by the magnetic force from moving across field lines.
A wire of mass 100 g, length 1 m and current 5 A is balanced in mid air by a magnetic field B, then find the value of B
0.2 T
0.1 T
0.5 T
0.6 T
A toroid with mean radius r0, diameter 2a have turns carrying current I. What is the magnetic field B outside the toroid?
zero
Two wires carrying
Parallel current repel each other.
Antiparallel current attract each other.
Antiparallel current repel each other.
Equal magnitudes of antiparallel current attract each other.
Assertion: A planar circular loop of area A and carrying current I is equivalent to magnetic dipole of dipole moment M = IA.
Reason: At large distances, magnetic field of circular loop and magnetic dipole is same.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
What is the dimensions of a magnetic field B in terms of C ( = coulomb ), M, L, T?
[ M1 L-1 T-2 C ]
[ M1 L0 T-1 C-1 ]
[ M1 L0 T-2 C ]
[ M1 L0 T-1 C ]