Electromagnetic Induction & Alternating Currents (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 111  116 of 124
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Question number: 111
» Electromagnetic Induction & Alternating Currents » LCR Series Circuit
Question
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45°. The value of C is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 112
» Electromagnetic Induction & Alternating Currents » Resonance
Question
The power factor of LCR circuit at resonance is
Choices
Choice (4)  Response  

a.  Zero 

b.  1 

c.  0.5 

d.  0.707 

Question number: 113
» Electromagnetic Induction & Alternating Currents » Resonance
Question
The phase difference between the current and voltage of LCR circuit in series combination at resonance is
Choices
Choice (4)  Response  

a.  π 

b.  π 

c.  0° 

d. 


Question number: 114
» Electromagnetic Induction & Alternating Currents » LCR Series Circuit
Question
In a series LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance would be changed from L to
Choices
Choice (4)  Response  

a. 


b. 


c.  2 L 

d.  4 L 

Question number: 115
» Electromagnetic Induction & Alternating Currents » Resonance
Question
In the nonresonant circuit, what will be the nature of the circuit for frequencies higher than the resonant frequency?
Choices
Choice (4)  Response  

a.  Resistive 

b.  Capacitive 

c.  Inductive 

d.  All of the above 

Question number: 116
» Electromagnetic Induction & Alternating Currents » LCR Series Circuit
Question
For series LCR circuit, correct statements are
(1) Applied e. m. f. and potential difference across resistance may be in phase
(2) Applied e. m. f. and potential difference at inductor coil have phase difference of π/2
(3) Potential difference across resistance and capacitor have phase difference of π/2
(4) Potential difference at capacitor and inductor have phase difference of π/2
Select the correct answers and mark it according to the following codes:
Codes:
Choices
Choice (4)  Response  

a.  1 and 3 are correct 

b.  2 and 4 are correct 

c.  1, 2 and 3 are correct 

d.  1 and 2 are correct 
