Electromagnetic Induction & Alternating CurrentsReactance and Impedance (NEET Physics): Questions 6  10 of 14
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
Question number: 6
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
A 20 volt ac is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is 12 V, the voltage across the coil is
Choices
Choice (4)  Response  

a.  6 volt 

b.  16 volt 

c.  8 volt 

d.  10 volt 

Question number: 7
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
One 10 V, 60 W bulb is to be connected to 100 V line. The required induction coil has selfinductance of value (f = 50Hz)
Choices
Choice (4)  Response  

a.  0.052 H 

b.  16.2 mH 

c.  2.42 H 

d.  1.62 mH 

Question number: 8
» 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: 9
» 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: 10
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
An inductor (L = 100 mH), a resistor (R = 100Ω) and a battery (E = 100 V) are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit 1 ms after the short circuit is
Choices
Choice (4)  Response  

a.  1 A 

b.  0.1 A 

c.  e A 

d. 

