AIIMS (All India Institute of Medical Sciences) Physics: Questions 327  331 of 500
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Question number: 327
» Magnetic Effects of Current and Magnetism » Magnet Oscillations
Question
A magnet makes 30 oscillations per minute at a place having magnetic field of. At another place, it takes 1.5 sec to complete one vibration. The value of earth’s horizontal field at that place is:
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 328
Question
The ratio of intensities of two waves is 16: 1. When they superimpose, the ratio of maximum to minimum intensity will become –
Choices
Choice (4)  Response  

a.  9: 25 

b.  25: 9 

c.  4: 1 

d.  1: 16 

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Question number: 329
» Work, Energy and Power » WorkEnergy Theorem
Question
A block of mass 20 kg is moving in xdirection with a constant speed of. It is subjected to a retarding force during its travel fromto . Its final kinetic energy will be –
Choices
Choice (4)  Response  

a.  500 joules 

b.  850 joules 

c.  750 joules 

d.  920 joules 

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Question number: 330
Question
Velocity of light in a liquid is and in air, it is . If a ray of light passes from this liquid into air, the critical angle will be –
Choices
Choice (4)  Response  

a.  60^{0} 

b.  30^{0} 

c.  45^{0} 

d.  Question does not provide sufficient data or is vague 

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Question number: 331
» 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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