Figure 1 Consider the RC circuit in Figure 1, with R 1 = 1475 O , R 2 = 3325 O ,

Question

Figure 1
Consider the RC circuit in Figure 1, with R1 = 1475 O, R2 = 3325 O, and C = 1.7 µF. When the switch is closed, the current will vary with time as sketched in Figure 2. What is the time constant for the circuit in Figure 1? Hint: Use equivalent circuit ideas to "reduce" this circuit to a form that looks like Figure 3. _____ s
Consider the RC circuit in Figure 1, with R1 = 1475 O, R2 = 3325 O, and C = 1.7 µF. When the switch is closed, the current will vary with time as sketched in Figure 2. What is the time constant for the circuit in Figure 1? Hint: Use equivalent circuit ideas to "reduce" this circuit to a form that looks like Figure 3. _____ s
Figure 1 Consider the RC circuit in Figure 1, with R1 = 1475 O, R2 = 3325 O, and C = 1.7 Mu F. When the switch is closed, the current will vary with time as sketched in Figure 2. What is the time constant for the circuit in Figure 1? Hint: Use equivalent circuit ideas to reduce this circuit to a form that looks like Figure 3.

Explanation / Answer

from the above circuit    both resistors are in series connection equavalent resistance Req = R1 + R2          = 1475O + 3325O = 4800O time constant in decay of charge t = CR                                                       = CReq                                                                     = 1.7µF * 4800O = 8.1*10-3s = 8.1ms          = 1475O + 3325O = 4800O time constant in decay of charge t = CR                                                       = CReq                                                                     = 1.7µF * 4800O = 8.1*10-3s = 8.1ms

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