Which one of the following is the transfer function of an

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Which one of the following is the transfer function of an electrical low pass filter using R and C elements?

1. RCS
  (1 + RCS)
2. 1
  (1 + RCS)
3. RC
  (1 + RCS)
4. S
  (1 + RCS)

Correct Option: B

The low pass filter using R and C components:

V₀(s) =	V_i(s)	1
		Cs

	R +	1
		Cs

V₀(s)	= H(s) =	1
V_i(s)	= H(s) =	(1 + RCs)

Hence alternative (B) is the correct choice.