1
MHT CET 2021 24th September Evening Shift
+1
-0

A current $$I=10 \sin (100 \pi t)$$ ampere, is passed in a coil which induces a maximum emf $$5 \pi$$ volt in neighbouring coil. The mutual inductance of two coils is

A
$$5 \mathrm{~mH}$$
B
$$10 \mathrm{~mH}$$
C
$$15 \mathrm{~mH}$$
D
$$25 \mathrm{~mH}$$
2
MHT CET 2021 24th September Evening Shift
+1
-0

A rectangular loop $$\mathrm{PQMN}$$ with movable arm $$\mathrm{PQ}$$ of length $$12 \mathrm{~cm}$$ and resistance $$2 \Omega$$ is placed in a uniform magnetic field of $$0.1 \mathrm{~T}$$ acting perpendicular to the plane of the loop as shown in figure. The resistances of the arms MN, NP and MQ are negligible. The current induced in the loop when arm PQ is moved with velocity $$20 \mathrm{~ms}^{-1}$$ is

A
0.12 A
B
0.06 A
C
0.24 A
D
0.18 A
3
MHT CET 2021 24th September Morning Shift
+1
-0

A coil has an area $$0.06 \mathrm{~m}^2$$ and it has 600 turns. After placing the coil in a magnetic field of strength $$5 \times 10^{-5} \mathrm{Wbm}^{-2}$$, it is rotated through $$90^{\circ}$$ in 0.2 second. The magnitude of average e.m.f induced in the coil is

$$\left[\cos 0^{\circ}=\sin 90^{\circ}=1 \text { and } \sin 0^{\circ}=\cos 90^{\circ}=0\right]$$

A
$$12 \times 10^{-3} \mathrm{~V}$$
B
$$3 \mathrm{~mV}$$
C
$$3 \mathrm{~V}$$
D
$$9 \times 10^{-3} \mathrm{~V}$$
4
MHT CET 2021 24th September Morning Shift
+1
-0

. If the current of '$$I$$' A gives rise to a magnetic flux '$$\phi$$' through a coil having '$$N$$' turns then mangetic energy stored in the medium surrounding the coil is

A
$$\frac{\mathrm{N} \phi \mathrm{I}}{4}$$
B
$$\frac{\mathrm{N} \phi \mathrm{I}}{2}$$
C
$$\frac{\mathrm{NI}}{2 \phi}$$
D
$$\frac{\mathrm{N} \phi}{2 \mathrm{I}}$$
EXAM MAP
Medical
NEET