Electromagnetic Induction & Alternating CurrentsPeak and RMS Value of AC (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 5  11 of 14
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Passage
Read the passage given below and answer the questions that follow:
If the voltage in an a c circuit is represented by the eq. , , then
Question number: 5 (1 of 2 Based on Passage) Show Passage
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
RMS value of the voltage is
Choices
Choice (4)  Response  

a. 


b.  314 V 

c. 


d.  220 V 

Question number: 6 (2 of 2 Based on Passage) Show Passage
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
Average voltage is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  220 V 

Question number: 7
» 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. 


Question number: 8
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
A resistance of 20Ω is connected to a source of an alternating potential V = 220 sin (100πt). The time taken by the current to change from its peak value to r. m. s value is,
Choices
Choice (4)  Response  

a.  0.25 sec 

b.  0.2 sec 

c.  2.5 x 10 ^{3} sec 

d.  25 x 10 ^{3} sec 

Question number: 9
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
In a circuit, the value of alternating current is measured by hot wire ammeter as 10 ampere. Its peak value will be
Choices
Choice (4)  Response  

a.  20 A 

b.  14.14 A 

c.  7.07 A 

d.  10 A 

Question number: 10
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
The peak value of an alternating e. m. f. E given by E = E _{0} cos t is 10 volts and its frequency is 50 Hz. At time , the instantaneous e. m. f. is
Choices
Choice (4)  Response  

a.  1 V 

b.  10 V 

c.  5 V 

d. 


Question number: 11
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
An alternating current is given by the equation . The r. m. s. current is given by
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

