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
A long solenoid of diameter 0.1 m has 2 $$ \times $$ 104 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10 $$\pi $$2 $$\Omega $$, the total charge flowing through the coil during this time is
A
16 $$\mu $$C
B
32 $$\mu $$C
C
16$$\pi $$ $$\mu $$C
D
32$$\pi $$ $$\mu $$C
3
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
4
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
