Electromagnetic Induction & Alternating Currents (AIIMS Physics): Questions 42  45 of 51
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Question number: 42
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Appeared in Year: 2006
Question
A coil of inductive reactance has a resistance of . It is placed in series with a condenser of capacitative reactance . The combination is connected to an a. c. source of 110 volt. The power factor of the circuit is – (AIPMT)
Choices
Choice (4)  Response  

a. 
 
b.  0.80  
c.  0.64  
d.  0.33 
Question number: 43
» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance
Question
A choke coil consists of 150 turns wound on a high permeability core. If the relative permeability is 3540, permeability of free space is , coil length is 5 cm and cross section area is then the value of the inductance of coil is –
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 44
» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction
Question
A rod of magnetic material having dimension is subjected in magnetizing field of then a magnetic moment of is induced in it. Therefore magnetic induction in rod is –
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 45
» Electromagnetic Induction & Alternating Currents » Induced EMF and Current
Appeared in Year: 1995
Question
Dimension of a rectangular coil is . Number of turns in coil is 60. It is rotating about its one of the diameter in an uniform magnetic field of , with the speed 1800 r. p. m. the maximum induced emf is – [RPMT]
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  113 V 