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# Practice Test 3 - page 10 / 16

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4) Four unequal resistors are connected in a parallel circuit. Which one of the following statements is correct about this circuit?

• A)

The total resistance is less than the smallest resistor.

• B)

The total resistance is equal to the average of the resistance of all the resistors.

• C)

The total resistance is more than the largest resistor.

• D)

None of the other answers is correct.

5) A 100 V DC signal is applied to four resistors as shown in Figure. The values of the resistors are 20 , 40 , 60 , and 80 . What is the voltage across the 40 resistor?

• A)

20 V

• B)

40 V

• C)

60 V

• D)

80 V

6) A light bulb operating at a voltage of 120 V has a resistance of 200 . What is the power? A) 100 W B) 72 W C) 14 × 10-3 D) 7.2 W Answer: B W

7) Which one of the following is a correct statement for a number of resistors connected in series or parallel?

• A)

The total resistance in a series circuit decreases as more resistors are added.

• B)

The flow of current is difficult through resistors connected in a series circuit.

• C)

The voltage is different across resistors connected in a parallel circuit.

• D)

The total resistance in a parallel circuit decreases as more resistors are added.