Electrical Engineering Questions and Answers


166)

All the voltage drops and the source voltage added together in a series circuit is equal to

Answer: Option C
167)

The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates

Answer: Option C
168)

When one of three series resistors is removed from a circuit and the circuit is reconnected, the current

Answer: Option A
169)

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 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is

Answer: Option A

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.
170)

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

Answer: Option C

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