CBSE
Multiple Choice QuestionsMagnetic field at ' ' distance a from long currying current wire is proportional to
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.
Identify incorrect for electric charge q
quantised
conserved
additive
non-transferable
Magnetic energy per unit volume is represented by
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.
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.
Electric field outside a long wire carrying charge q is proportional to
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
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 ]
