Electromagnetic Induction & Alternating CurrentsFaraday's Law (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 4  7 of 8
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Question number: 4
» Electromagnetic Induction & Alternating Currents » Faraday's Law
Question
An airplane having a distance of 50 meter between the edges of its wings is flying horizontally with a speed of 360km/hour. If the vertical component of earth’s magnetic field is 4 x 10 ^{4} weber/m ^{2}, then the induced emf between the edges of its wings will be 
Choices
Choice (4)  Response  

a.  2 V 

b.  0.2 V 

c.  2 mV 

d.  20 V 

Question number: 5
» Electromagnetic Induction & Alternating Currents » Faraday's Law
Question
The magnetic flux passing perpendicular to the plane of the coil and directed into the paper is varying according to the relation , where is in milliweber and t is in second. Then the magnitude of emf induced in the loop when t = 2 second is
Choices
Choice (4)  Response  

a.  19 mV 

b.  31 mV 

c.  14 mV 

d.  6 mV 

Question number: 6
» Electromagnetic Induction & Alternating Currents » Faraday's Law
Question
A rectangular coil of size 10 cm x 20 cm has 60 turns. It is rotating about one of its diagonals in magnetic field 0.5 Wb/m ^{2} with a rate of 1800 revolution per minute. The induced e. m. f. in the coil can be,
(1) 111 V (2) 112 V
(3) 113 V (4) 114 V
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  2 and 4 are correct 

b.  1 and 3 are correct 

c.  1, 2 and 3 are correct 

d.  1 and 2 are correct 

Question number: 7
» Electromagnetic Induction & Alternating Currents » Faraday's Law
Question
A copper disc of radius 0.1 m rotates about its center with 10 revolution per second in a uniform magnetic field of 0.1 T. The emf induced across the radius of the disc is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

