Electric Circuits
Two resistances R1 and R2 give combined resistances 4.5 Ω and 1 Ω when they are connected in series and parallel respectively. What would be the values of these resistances?

 6 Ω and 9 Ω.
  1.5 Ω and 3 Ω.
  3 Ω and 6 Ω.
 3 Ω and 9 Ω.

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Electric Circuits
What is time period T?

 Time taken by an alternating quantity to complete one full cycle.
 Time taken by an alternating quantity to complete the (+)ve half.
 Time taken by an alternating quantity to reach the peak value.
 Time taken by an alternating quantity to complete the (-)ve half.

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