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All India Engineering / Architecture Entrance Examination (AIEEE)

CBSE Guess > AIEEE > AIEEE Papers > 2009 > Physics

AIEEE 2009 Physics

Q.15.   A p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. The current (I) in the resistor (R) can be shown by

           


  1.  







 

Sol.: Current will flow when diode is forward biased.

Answer: (4)

Q.16. A motor cycle starts from rest and accelerates along a straight path at 2 m/s2. At the starting point of the motor cycle there is a stationary electric siren. How far has the motor cycle gone when the driver hears the frequency of the siren at 94% of its value when the motor cycle was at rest? (Speed of sound = 330 ms–1)

  1. 196 m

  2. 49 m

  3. 98 m

  4.  147 m

Sol:    

Answer: (3)