The on-delay timed period for the timer shown would be:
A)3 seconds
B)4 seconds
C)20 seconds
D)200 seconds

Question

The on-delay timed period for the timer shown would be: 
A)3 seconds 
B)4 seconds 
C)20 seconds 
D)200 seconds

Quizplus · Accepted Answer

To determine the on-delay timed period of the timer, we need to add up the value of the four resistors in series:

R1 = 10 kΩ = 10,000 Ω 
R2 = 22 kΩ = 22,000 Ω 
R3 = 47 kΩ = 47,000 Ω 
R4 = 100 kΩ = 100,000 Ω

Total resistance = R1 + R2 + R3 + R4 = 179,000 Ω

Using the formula:

Time delay = 1.1 x R x C

where R is the resistance in ohms and C is the capacitance in farads, we can calculate the time delay.

The capacitance value is given as 220 µF, which we need to convert to farads:

220 µF = 0.00022 F

Substituting the values:

Time delay = 1.1 x 179000 x 0.00022 
= 44.138

Rounding off to the nearest multiple of 10, we get:

Time delay ≈ 44 seconds

Therefore, the on-delay timed period for the timer is approximately 44 seconds, which is closest to option C (20 seconds).

The On-Delay Timed Period for the Timer Shown Would Be