Electromagnetic Induction & Alternating Currents (AIIMS (All India Institute of Medical Sciences) Physics): Questions 31  35 of 51
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Question number: 31
» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance
Question
The current passing through a choke coil of 9 H is decreasing at the rate of. The emf developing across the coil is –
Choices
Choice (4)  Response  

a.  27 V 

b.  27 V 

c.  3 V 

d.  – 3.0 V 

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Question number: 32
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
The reactance of an inductance of 0.05H for 100 Hz A. C. is –
Choices
Choice (4)  Response  

a.  31.4 Ω 

b.  6.28 Ω 

c.  3.14 Ω 

d.  62.8 Ω 

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Question number: 33
» Electromagnetic Induction & Alternating Currents » Reactance and Impedance
Question
The impedance of a circuit, when a resistance and a capacitor of capacitance are connected in series in an A. C. circuit of frequency 50 Hz is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 34
» Electromagnetic Induction & Alternating Currents » Induced EMF and Current
Appeared in Year: 1997
Question
A coil of copper having 900 turns is placed in a magnetic field perpendicular to its plane. The cross sectional area of the coil is 0.5 m^{2}. If it turns through 180° in 0.02 sec, then the induced emf in the coil is –
Choices
Choice (4)  Response  

a.  135 V 

b.  35 V 

c.  0.4 V 

d.  0.2 V 

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Question number: 35
» Electromagnetic Induction & Alternating Currents » Induced EMF and Current
Question
A conducting ring of radius 2 meter is placed in a uniform magnetic field B of 0.04 T, oscillating with frequency 500 Hz with its plane at right angles to magnetic field. What will be the induced electric field?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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