A pair of coils has mutual inductance of 2H. If the current in the primary changes from 10A to zero in 0.1 sec, the induced emf in the secondary will be ?
A)- 100V
B)- 200V
C)- 300V
D)- 400V
ANS: B
A photon while passing through a magnetic field are deflected towards?
A)North pole
B)South pole
C)North or sound depending on their charge.
D)None of the above.
Ans:D
A simple pendulum consists of a bob, which is a hollow sphere containing mercury suspended by means of a wire. If the mercury is drained out from a small hole at the bottom, the period of the pendulum will? (assume that mercury is drained suddently in no time)
ANS: Remain Same
As the viscosity of the air increases, the terminal velocity of the falling droplets?
A)Remains same.
B)Increases at the same rate.
C)Decreases.
D)Increases at twice the rate.
ANS: C
When oxidizing agents,in the form of shampoo is applied on hair, it acts upon 'cystein' to make your.
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Ans.b