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单选题Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel?()A 2.66 ohmsB Less than 1 ohmC 4 ohmsD 12 ohms

题目
单选题
Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel?()
A

2.66 ohms

B

Less than 1 ohm

C

4 ohms

D

12 ohms


相似考题
更多“单选题Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel?()A 2.66 ohmsB Less than 1 ohmC 4 ohmsD 12 ohms”相关问题
  • 第1题:

    W11--4油田复合海底电缆中动力缆线的导体电阻(20度)为()。

    • A、0.068 OHM / KM
    • B、0.168 OHM / KM
    • C、0.268 OHM / KM
    • D、0.368 OHM / KM

    正确答案:C

  • 第2题:

    FXC E1 can support()2M。

    • A、4*120ohm
    • B、4*75ohm
    • C、1*75or120ohm

    正确答案:B

  • 第3题:

    Which of the following cabling would be MOST commonly used with digital volume controls?()

    • A、Unshielded twisted pair
    • B、RJ-59
    • C、16/4 solid conductors
    • D、Speaker Wire

    正确答案:A

  • 第4题:

    TCM系统CANBUS总体电阻应为()符合要求。

    • A、20—40ohm
    • B、40—60ohm
    • C、80—100ohm
    • D、100—120ohm

    正确答案:A

  • 第5题:

    防静电接地采用软接地时,对接地电阻和泻放电流的要求正确的()。

    • A、≥1×105ohm,≤0.5mA
    • B、≥1×105ohm,≤5mA
    • C、≥1×106ohm,≤0.5mA
    • D、≥1×103ohm,≤5mA

    正确答案:B

  • 第6题:

    According to Ohm’s Law, which of the following is correct?()

    • A、As voltage increases, resistance decreases
    • B、As amperage decreases, resistance decreases
    • C、As resistance decreases, amperage increases
    • D、As resistance increases, voltage increases

    正确答案:C

  • 第7题:

    Which of the following is the BEST tool to troubleshoot a DB-9 port?()

    • A、Ohm meter
    • B、Anti-static wrist strap
    • C、Oscilloscope
    • D、Loopback plug

    正确答案:D

  • 第8题:

    单选题
    What would the amps be at 240 volts with an 8 ohm resistance?()
    A

    32~5 amps

    B

    25 amps

    C

    1~5 amps

    D

    30 amps


    正确答案: B
    解析: 暂无解析

  • 第9题:

    单选题
    Which of the following is the primary purpose of impedance matched volume control?()
    A

    Maintains proper speaker phase

    B

    Protects the amplifier from damage

    C

    Protects the digital systems from damage

    D

    Amplifies the speaker signal


    正确答案: D
    解析: 暂无解析

  • 第10题:

    单选题
    Which of the following best describes why a customer would choose x86 server solutions over mid-range or mainframe solutions?()
    A

    x86 servers are more reliable than mid-range and Mainframe servers.

    B

    x86 servers require less support personnel.

    C

    Microsoft Operating Systems require less maintenance than mid-range and Mainframe Operating Systems.

    D

    x86 solutions cost less.


    正确答案: B
    解析: 暂无解析

  • 第11题:

    多选题
    电压为12V,电阻为1000Ohm,则流经电阻的电流为多少?()
    A

    没有电流能以12V电压流经1000Ohm电阻。

    B

    12mA

    C

    0.012A

    D

    833mA


    正确答案: A,B
    解析: 暂无解析

  • 第12题:

    单选题
    Which method listed below is acceptable by classification society to perform hose testing to weather tight hatch covers and closing appliances()
    A

    This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.

    B

    This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 3,5 kgf/cm2. The nozzle diameter is not to be less than 5mm.

    C

    This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 4,0 kgf/cm2. The nozzle diameter is not to be less than 8mm.

    D

    This is to be carried out at a maximum distance of 2,0m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.


    正确答案: A
    解析: 暂无解析

  • 第13题:

    Which method listed below is acceptable by classification society to perform hose testing to weather tight hatch covers and closing appliances()

    • A、This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.
    • B、This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 3,5 kgf/cm2. The nozzle diameter is not to be less than 5mm.
    • C、This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 4,0 kgf/cm2. The nozzle diameter is not to be less than 8mm.
    • D、This is to be carried out at a maximum distance of 2,0m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.

    正确答案:A

  • 第14题:

    静电手腕带的电阻值为:()

    • A、106OHM
    • B、103OHM
    • C、104OHM
    • D、105OHM

    正确答案:B

  • 第15题:

    Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel?()

    • A、2.66 ohms
    • B、Less than 1 ohm
    • C、4 ohms
    • D、12 ohms

    正确答案:A

  • 第16题:

    The provisions of MARPOL Annex IV shall apply to the following ships engaged ininternational voyages:()

    • A、New Ships of 400 gross tonnage and above
    • B、New Ships of less than 400 gross tonnage
    • C、New Ships of less than 400 gross tonnage which are certified to carry more than 15persons
    • D、New Ships of less than 400 gross tonnage which are certified to carry less than 15persons

    正确答案:A,C

  • 第17题:

    Bob, a technician, is troubleshooting a PC that intermittently does not power on. Which of the following tools would be the BEST choice to use to verify a possible cause? ()

    • A、Cable tester
    • B、Ohm meter
    • C、Field strength meter
    • D、PSU tester

    正确答案:D

  • 第18题:

    Which of the following is the primary purpose of impedance matched volume control?()

    • A、Maintains proper speaker phase
    • B、Protects the amplifier from damage
    • C、Protects the digital systems from damage
    • D、Amplifies the speaker signal

    正确答案:B

  • 第19题:

    Given the following code fragment:      1) String str = null;  2) if ((str != null) && (str.length() > 10)) {     3) System.out.println("more than 10");     4) }  5) else if ((str != null) & (str.length() < 5)) {     6) System.out.println("less than 5");     7) }  8) else { System.out.println("end"); }   Which line will cause error?()    

    • A、 line 1
    • B、 line 2
    • C、 line 5
    • D、 line 8

    正确答案:C

  • 第20题:

    单选题
    Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel?()
    A

    2.66 ohms

    B

    Less than 1 ohm

    C

    4 ohms

    D

    12 ohms


    正确答案: C
    解析: 暂无解析

  • 第21题:

    单选题
    E1采用的接口是G.703中的非平衡的()和平衡的()2种接口。
    A

    120ohm;75ohm

    B

    75ohm;120ohm

    C

    75ohm;75ohm

    D

    120ohm;120ohm


    正确答案: A
    解析: 暂无解析

  • 第22题:

    单选题
    Given the following code fragment:      1) String str = null;  2) if ((str != null) && (str.length() > 10)) {     3) System.out.println("more than 10");     4) }  5) else if ((str != null) & (str.length() < 5)) {     6) System.out.println("less than 5");     7) }  8) else { System.out.println("end"); }   Which line will cause error?()
    A

     line 1

    B

     line 2

    C

     line 5

    D

     line 8


    正确答案: C
    解析: 此题需要将代码仔细看清楚,查询没有逻辑错误,if …else的使用没有问题,也没有拼写错误,错误在于第5行的“与”操作符的使用,逻辑操作符(logical operator)的“与” 应该是&&,而&是位逻辑操作符(bitwise logical operator)的“与”,使用的对象不一样,逻辑操作符的“与”的左右操作数都应该是布尔型(logical boolan)的值,而位逻辑操作符的左右操作数都是整型(integral)值。

  • 第23题:

    单选题
    According to Ohm’s Law, which of the following is correct?()
    A

    As voltage increases, resistance decreases

    B

    As amperage decreases, resistance decreases

    C

    As resistance decreases, amperage increases

    D

    As resistance increases, voltage increases


    正确答案: C
    解析: 暂无解析

  • 第24题:

    单选题
    Which of the following statements is TRUE?
    A

    The less education he or she has, the more regrets she or he would have.

    B

    The more education he or she has, the less regrets she or he would have.

    C

    More women than men had regrets about love and family.

    D

    The regret of action seems to last longer than that of inaction.


    正确答案: B
    解析: