Advertisements
Advertisements
प्रश्न
The mutual inductance M12 of coil 1 with respect to coil 2 ______.
- increases when they are brought nearer.
- depends on the current passing through the coils.
- increases when one of them is rotated about an axis.
- is the same as M21 of coil 2 with respect to coil 1.
पर्याय
a and b
b and c
c and d
a and d
Advertisements
उत्तर
a and d
Explanation:
Mutual Induction: Whenever the current passing through a coil or circuit changes, the magnetic flux linked with a neighbouring coil or circuit will also change. Hence an emf will be induced in the neighbouring coil or circuit. This phenomenon is called ‘mutual induction’.
The mutual inductance M12 of coil 1 w.r.t. coil 2 increases when they are brought nearer and is the same as M21 of coil 2 with respect to coil 1.
M12, i.e., mutual inductance of solenoid S1 with respect to solenoid S2 is given by
`M_12 = (mu_0N_1N_2pir_1^2)/l`
Where signs are as usual.
Also, M21, i.e., mutual inductance of solenoid S2 with respect to solenoid S1 is given by
`M_21 = (mu_0N_1N_2pir_1^2)/l`
So, we have M12 = M21 = M
APPEARS IN
संबंधित प्रश्न
The co-efficient of mutual induction between primary and secondary coil is 2H. Calculate induced e.m.f. if current of 4A is cut off in 2.5 x 10-4 seconds
Find the mutual inductance between the straight wire and the square loop of figure.
Find the mutual inductance between the circular coil and the loop shown in figure.
The current in a long solenoid of radius R and having n turns per unit length is given by i= i0 sin ωt. A coil having N turns is wound around it near the centre. Find (a) the induced emf in the coil and (b) the mutual inductance between the solenoid ant the coil.
A solenoid of length 20 cm, area of cross-section 4.0 cm2 and having 4000 turns is placed inside another solenoid of 2000 turns having a cross-sectional area 8.0 cm2 and length 10 cm. Find the mutual inductance between the solenoids.
A pair of the adjacent coil has a mutual inductance of 1.5 H. If the current in one coil varies from 0 to 20 A in 0.5 s, what is the change of flux linked with the other coil.
The dimensions of self or mutual inductance are given as ______.
A coil of radius 'r' is placed on another coil (whose radius is 'R' and current flowing through it is changing) so that their centres coincide. (R>>r) if both the coils are coplanar then the mutual inductance between them is proportional to ______.
Two coils P and Q have mutual inductance 'M' H. If the current in the primary is I = I0 sin `omega`t, then the maximum vlaue of e.m.f. indued in coil Q is ____________.
The mutual inductance between two coils is 0.09 henry. If the current in the primary coil changes from 0 to 20 A in 0.006 s, the e.m.f. induced in the secondary coil at that instant is ____________.
If number of turns in primary and secondary coils is increased to two times each, the mutual inductance ______.
Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon the ______.
Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1 > > R2, the mutual inductance M between them will be directly proportional to ______.
A plane loop is shaped in the form as shown in figure with radii a = 20 cm and b = 10 cm and is placed in a uniform time varying magnetic field B = B0 sin ωt, where B0 = 10 mT and ω = 100 rad/s. The amplitude of the current induced in the loop if its resistance per unit length is equal to 50 × 10-3 Ω/m. The inductance of the loop is negligible is ______ A.
Two circular loops, one of small radius r and the other of larger radius R, such that R >> r, are placed coaxially with centres coinciding. Obtain the mutual inductance of the arrangement.
Write the S.I. unit of mutual inductance.
