1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A 800 turn coil of effective area 0.05 m2 is kept. perpendicular to a magnetic filed 5 × 10–5 T. When the plane of the coil is rotated by 90o around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :
A
0.2 V
B
0.02 V
C
2 V
D
2 $$ \times $$ 10-3 V
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when :
A
the wire is horizontal
B
inclined at an angle of 60o from vertical
C
the mass is at the lowest point
D
the mass is at the highest point
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A parallel plate capacitor of capacitance 20 $$\mu $$F is being charged by a voltage source whose potential is changing at the rate of 3V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively :
A
zero, zero
B
zero, 60 $$\mu $$A
C
60 $$\mu $$A, 60 $$\mu $$A
D
60 $$\mu $$A, zero
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following devices, the eddy current effect is not used?
A
magnetic braking in train
B
electromagnet
C
electric heater
D
induction furnace