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Electrical Engineering - Series Circuits

Exercise : Series Circuits - General Questions
1.
When a fourth resistor is connected in series with three resistors, the total resistance
increases by one-fourth
increases
decreases
remains the same
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is
0 V
1.2 V
6 V
0.6 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
A series circuit consists of three resistors with values of 120 , 270 , and 330 . The total resistance is
less than 120
the average of the values
720
120
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 . If each resistor is operating in the circuit at its maximum power dissipation, total current flow is
27 mA
2.7 mA
19 mA
190 mA
Answer: Option
Explanation:

Total P = P1 + P2 + P3 = 7/8w.

P = I2R.

I = sqrt (P/R)

Now, P = 7/8w, R = 1200 ohm.

Therefore,

I= sqrt ( (7/8)/1200 ) = 0.0270030862 = 27 mA.

5.
Which of the following series combinations dissipates the most power when connected across a 120 V source?
one 220 resistor
two 220 resistors
three 220 resistors
four 220 resistors
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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