Figure shows a circuit that contains three identical resistors with resistance R = 9.0 $$\Omega $$ each, two identical inductors with inductance $$L$$ = 2.0 mH each, and an ideal battery with emf $$\varepsilon = 18V$$. The current $$i$$ through the battery just after the switch closed is
A
0.2 A
B
4 A
C
0 ampere
D
2 mA
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
In an electromagnetic wave in free space that root mean square value of the electric field is Erms = 6 V m$$-$$1. The peak value of the magnetic field is
A
2.83 $$ \times $$ 10$$-$$8 T
B
0.70 $$ \times $$ 10$$-$$8 T
C
4.23 $$ \times $$ 10$$-$$8 T
D
1.41 $$ \times $$ 10$$-$$8 T
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
The ratio of resolving powers of an optical microscope for two wavelength $$\lambda $$1 = 4000 $$\mathop A\limits^ \circ $$ and $${\lambda _2}$$ = 6000 $$\mathop A\limits^ \circ $$ is
A
9 : 4
B
3 : 2
C
16 : 81
D
8 : 27
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly