Electromagnetic Induction & Alternating Currents (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 63  67 of 124
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Question number: 63
» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer
Question
The current in the primary coil of a transformer (assuming no power loss) as shown in fig. will be –
Choices
Choice (4)  Response  

a.  10 ^{6 } A 

b.  1.0A 

c.  0.01 A 

d.  0.1 A 

Question number: 64
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
A resistance of 300 Ω and an inductance of 1/π henry are connected in series to a ac voltage of 20 volt and 200 Hz frequency. The phase angle between the voltage and current is,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 65
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
Energy stored in an inductor is proportional to (i= current in the inductor)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 66
» Electromagnetic Induction & Alternating Currents » LCR Series Circuit
Question
A resistor and a capacitor are connected in series with an ac source. If the potential drop across the capacitor is 5 V and that across resistor is 12 V, applied voltage is,
Choices
Choice (4)  Response  

a.  12 V 

b.  17 V 

c.  13 V 

d.  5 V 

Question number: 67
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
If instantaneous current is given by amperes, then the r. m. s value of current is
Choices
Choice (4)  Response  

a.  4 ampere 

b. 


c.  zero ampere 

d. 

