Series circuits electronic interview question

11.

An 8-ohm resistor is in series with a lamp. The circuit current is 1 A. With 20 V applied, what voltage is being allowed for the lamp?
A.     4 V
B.     8 V
C.     12 V
D.     20 V
Answer & Explanation

Answer: Option C

Explanation:

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12.

What is wrong, if anything, with this circuit?

A.     R1 is open.
B.     R1 is shorted.
C.     R2 is open.
D.     R2 is shorted.
Answer & Explanation

Answer: Option B

Explanation:

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13.

Kirchhoff’s voltage law states that:
A.     the sum of the voltage drops in a series circuit is equal to the total applied voltage
B.     the algebraic sum of the resistances is equal to the sum of the voltages
C.     the algebraic sum of the individual currents around a closed loop is zero
D.     the voltages developed across each element in a series circuit are identical
Answer & Explanation

Answer: Option A

Explanation:

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14.

If series current doubles, then:
A.     resistance is halved
B.     voltage is doubled
C.     voltage is reduced
D.     resistance is doubled
Answer & Explanation

Answer: Option A

Explanation:

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15.

What are the minimum and maximum output voltages?

A.     0 V, 4 V
B.     0 V, 8 V
C.     0 V, 12 V
D.     0 V, 16 V
Answer & Explanation

Answer: Option D

Explanation:

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