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    1).
    When a fourth resistor is connected in series with three resistors, the total resistance
    A   increases by one-fourth   
    B   increases   
    C   decreases   
    D   remains the same   
    ANS: B - increases

    No answer description available for this question

    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
    A   0 V   
    B   1.2 V   
    C   6 V   
    D   0.6 V   
    ANS: C - 6 V

    No answer description available for this question

    3).
    A series circuit consists of three resistors with values of 120 , 270 , and 330 . The total resistance is
    A   less than 120    
    B   the average of the values   
    C   720    
    D   120    
    ANS: C - 720 

    No answer description available for this question

    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
    A   27 mA   
    B   2.7 mA   
    C   19 mA   
    D   190 mA   
    ANS: A - 27 mA

    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?
    A   one 220  resistor   
    B   two 220  resistors   
    C   three 220  resistors   
    D   four 220  resistors   
    ANS: A - one 220  resistor

    No answer description available for this question

    6).
    When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
    A   increases   
    B   ncreases by one-third   
    C   decreases by one-third   
    D   decreases by the amount of current through the removed resistor   
    ANS: A - increases

    No answer description available for this question

    7).
    The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates
    A   12 W   
    B   48 W   
    C   3 W   
    D   8 W   
    ANS: C - 3 W

    No answer description available for this question

    8).
    The following resistors (one each) are connected in a series circuit: 470 , 680 , 1 k, and 1.2 k. The voltage source is 20 V. Current through the 680  resistor is approximately
    A   60 mA   
    B   30 mA   
    C   6 mA   
    D   300 mA   
    ANS: B - 30 mA

    No answer description available for this question

    9).
    A series circuit consists of a 4.7 k, a 12 k, and a 2.2 k resistor. The resistor that has the most voltage drop is
    A   the 12 k   
    B    the 2.2 k   
    C   the 4.7 k   
    D   impossible to determine from the given information   
    ANS: A - the 12 k

    No answer description available for this question

    10).
    All the voltage drops and the source voltage added together in a series circuit is equal to
    A  
    the total of the voltage drops
    		  
    B   the source voltage   
    C   zero   
    D   the total of the source voltage and the voltage drops   
    ANS: C - zero

    No answer description available for this question