Basic Electronics and Theory
series and parallel resistors
In a parallel circuit with a voltage source and several branch resistors, how is the total current related to the current in the branch resistors?
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Correct AnswerIt equals the sum of the branch current through each resistor
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It equals the average of the branch current through each resistor
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It decreases as more parallel resistors are added to the circuit
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It is the sum of each resistor's voltage drop multiplied by the total number ofresistors
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A 6 volt battery is connected across three resistances of connected in parallel.
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Correct AnswerThe current through the 10 ohms, 15 ohms and 20 ohms separate resistances, when added together, equals the total current drawn from the battery
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The current flowing through the 10 ohm resistance is less than that flowing through the 20 ohm resistance
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The voltage drop across each resistance added together equals 6 volts
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The voltage drop across the 20 ohm resistance is greater than the voltage across the 10 ohm resistance
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Total resistance in a parallel circuit:
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Correct Answeris always less than the smallest resistance
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depends upon the IR drop across each branch
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could be equal to the resistance of one branch
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depends upon the applied voltage
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Two resistors are connected in paralle and are connected across a 40 volt battery. If each resistor is 1000 ohms, the total current is:
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Correct Answer80 milliamperes
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40 milliamperes
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80 amperes
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40 amperes
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The total resistance of resistors connected in series is:
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Correct Answergreater than the resistance of any one resistor
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less than the resistance of any one resistor
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equal to the highest resistance present
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equal to the lowest resistance present
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Which series combination of resistors would replace a single 120 ohm resistor?
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six 22 ohm
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two 62 ohm
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five 100 ohm
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Correct Answerfive 24 ohm
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If ten resistors of equal value were wired in parallel, the total resistance would be:
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10 / R
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Correct AnswerR / 10
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10 x R
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10 + R
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The total resistance of four 68 ohm resistors wired in parallel is:
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12 ohms
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34 ohms
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272 ohms
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Correct Answer17 ohms
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Two resistors are in parallel. Resistor A carries twice the current of resistor B, which means that:
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the voltage across B is twice that across A
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the voltage across A is twice that across B
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Correct AnswerA has half the resistance of B
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B has half the resistance of A
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The total current in a parallel circuit is equal to the:
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source voltage divided by the value of one of the resistive elements
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Correct Answersum of the currents through all the parallel branches
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source voltage divided by the sum of the resistive elements
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current in any one of the parallel branches
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