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267 lines
3.7 KiB
Plaintext
267 lines
3.7 KiB
Plaintext
% FILENAME = N5.TXT
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% Ohm's Law
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Release version 3, October 2001
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%Question: 1
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#5.1 The voltage across a resistor carrying current can be calculated using the formula:
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E = I + R [voltage equals current plus resistance]
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E = I - R [voltage equals current minus resistance]
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E = I x R [voltage equals current times resistance]
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E = I / R [voltage equals current divided by resistance]
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% ans 3
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%Question: 2
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#5.2 A 10 mA current is measured in a 500 ohm resistor. The voltage across the resistor will be:
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5 volt
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50 volt
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500 volt
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5000 volt
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% ans 1
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%Question: 3
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#5.3 The value of a resistor to drop 100 volt with a current of 0.8 milliampere is:
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125 ohm
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125 kilohm
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1250 ohm
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1.25 kilohm
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% ans 2
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%Question: 4
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#5.4 I = E/R is a mathematical equation describing:
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Ohm's Law
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Thevenin's Theorem
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Kirchoff's First Law
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Kirchoff's Second Law
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% ans 1
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%Question: 5
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#5.5 The voltage to cause a current of 4.4 ampere in a 50 ohm resistance is:
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2220 volt
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220 volt
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22.0 volt
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0.222 volt
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% ans 2
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%Question: 6
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#5.6 A current of 2 ampere flows through a 16 ohm resistance. The applied voltage is:
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8 volt
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14 volt
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18 volt
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32 volt
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% ans 4
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%Question: 7
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#5.7 A current of 5 ampere in a 50 ohm resistance produces a potential difference of:
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20 volt
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45 volt
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55 volt
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250 volt
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% ans 4
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%Question: 8
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#5.8 This voltage is needed to cause a current of 200 mA to flow in a lamp of 25 ohm resistance:
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5 volt
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8 volt
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175 volt
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225 volt
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% ans 1
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%Question: 9
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#5.9 A current of 0.5 ampere flows through a resistance when 6 volt is applied. To change the
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current to 0.25 ampere the voltage must be:
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increased to 12 volt
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reduced to 3 volt
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held constant
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reduced to zero
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% ans 2
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%Question: 10
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#5.10 The current flowing through a resistor can be calculated by using the formula:
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I = E x R [current equals voltage times resistance]
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I = E / R [current equals voltage divided by resistance]
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I = E + R [current equals voltage plus resistance]
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I = E - R [current equals voltage minus resistance]
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% ans 2
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%Question: 11
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#5.11 When an 8 ohm resistor is connected across a 12 volt supply the current flow is:
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12 / 8 amps
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8 / 12 amps
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12 - 8 amps
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12 + 8 amps
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% ans 1
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%Question: 12
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#5.12 A circuit has a total resistance of 100 ohm and 50 volt is applied across it. The current flow will be:
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50 mA
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500 mA
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2 ampere
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20 ampere
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% ans 2
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%Question: 13
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#5.13 The following formula gives the resistance of a circuit:
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R = I / E [resistance equals current divided by voltage]
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R = E x I [resistance equals voltage times current
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R = E / R [resistance equals voltage divided by resistance]
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R = E / I [resistance equals voltage divided by current]
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% ans 4
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%Question: 14
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#5.14 A resistor with 10 volt applied across it and passing a current of 1 mA has a value of:
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10 ohm
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100 ohm
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1 kilohm
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10 kilohm
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% ans 4
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%Question: 15
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#5.15 If a 3 volt battery causes 300 mA to flow in a circuit, the circuit resistance is:
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10 ohm
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9 ohm
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5 ohm
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3 ohm
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% ans 1
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%Question: 16
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#5.16 A current of 0.5 ampere flows through a resistor when 12 volt is applied. The value of the resistor is:
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6 ohms
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12.5 ohms
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17 ohms
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24 ohms
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% ans 4
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%Question: 17
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#5.17 The resistor which gives the greatest opposition to current flow is:
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230 ohm
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1.2 kilohm
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1600 ohm
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0.5 megohm
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% ans 4
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%Question: 18
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#5.18 The ohm is the unit of:
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supply voltage
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electrical pressure
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current flow
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electrical resistance
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% ans 4
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%Question: 19
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#5.19 If a 12 volt battery supplies 0.15 ampere to a circuit, the circuit's resistance is:
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0.15 ohm
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1.8 ohm
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12 ohm
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80 ohm
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% ans 4
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%Question: 20
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#5.20 If a 4800 ohm resistor is connected to a 12 volt battery, the current flow is:
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2.5 mA
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25 mA
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40 A
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400 A
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% ans 1
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