850971
Descrição
Quiz por Vito Martino, atualizado more than 1 year ago
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Criado por Vito Martino
mais de 10 anos atrás
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Questão 1
Responda
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0.356 Ω
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0.536 Ω
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0.178 Ω
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0.235 Ω
Questão 2
Responda
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50 m
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25 m
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30 m
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40 m
Questão 3
Responda
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0.065 Ω
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0.552 Ω
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0.045 Ω
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0.055 Ω
Questão 4
Questão
Which of the following formulas can calculate power in a resistive circuit
Responda
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Image:Slide1.JPG (image/JPG)
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Image:Slide2.JPG (image/JPG)
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Image:Slide3.JPG (image/JPG)
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Image:Slide4.JPG (image/JPG)
Questão 5
Questão
3 x 12Ω resistors are connected in parallel to a 200V supply, calculate the total power of the circuit.
Responda
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10,000W
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400W
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1,000W
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1,111W
Questão 6
Questão
Two resistors of 20 ohms and 40 ohms are connected in series across a 120v d.c. supply, the current flowing in the circuit will be:
Responda
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20 A
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2 A
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5 A
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0.5 A
Questão 7
Questão
If three resistors are connected in series and have resistances of 20 Ω, 30 Ω, and 40 Ω then the total resistance would be
Responda
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100 Ω
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90 Ω
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70 Ω
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80 Ω
Questão 8
Questão
3 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of the circuit.
Responda
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10 KW
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0.666 KW
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0.333 KW
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12 KW
Questão 9
Responda
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10 Ω
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15 Ω
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100 Ω
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90 Ω
Questão 10
Questão
To measure the current through a load the meter must be connected
Responda
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across the load
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in parallel with the supply
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in parallel with the load
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In series with the load
Questão 11
Questão
To measure the voltage across a load the meter must be connected
Responda
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before the load
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in parallel with the supply
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in parallel with the load
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In series with the load
Questão 12
Questão
In the diagram below if I1 and I2 are ammeter readings then
Image:
Series_circuit_2 (image/jpg)
Responda
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I2 will be greater than I1
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I1 will be greater than I2
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I1 will be equal to I2
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I1 will be half I2
Questão 13
Responda
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the current through R3
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the current through R1 and R2
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the volt drop across R1 and R2
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the volt drop across R1 and R3
Questão 14
Responda
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the current through R3
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the current through R1
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the volt drop across R1 and R2
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the volt drop across R1
Questão 15
Responda
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current through a resistor
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supply current
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Voltage across a resistor
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supply voltage
Questão 16
Responda
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current through a resistor
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supply current
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Voltage across a resistor
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supply voltage
Questão 17
Responda
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0.1A
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10A
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20A
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1.1A
Questão 18
Questão
If four resistors each of 50 Ω are connected in parallel the overall resistance is
Responda
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25 Ω
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100 Ω
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12.5 Ω
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200 Ω
Questão 19
Responda
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none of them
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1 and 3
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2 and 3
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1
Questão 20
Responda
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none of them
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3
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2
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1
Questão 21
Questão
When current flows in a conductor, a magnetic field is created around the conductor
Responda
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when the voltage is high enough
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only if it is a coil
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as long as the current flows
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only when d.c is applied
Questão 22
Responda
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the supply current
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the current through R1
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the volt drop across R1 and R2
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the volt drop across R1
Questão 23
Responda
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the supply current
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the current through R1
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the volt drop across R2 and R3
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the supply voltage
Questão 24
Responda
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the supply current
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the current through the resistor
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the supply voltage
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the voltage across the resistor
Questão 25
Responda
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the supply current
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the current through the resistor
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the supply voltage
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the voltage across the resistor
Questão 26
Questão
Of the following materials which would be the BEST conductor of electricity?
Responda
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Nichrome
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Steel
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Aluminium
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Copper
Questão 27
Questão
A poor conductor of electricity is:
Responda
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Glass
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Copper
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Aluminium
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Silver
Questão 28
Questão
The resistance of an electrical conductor is:
Responda
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Affected by the weather
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Determined by the formula I = P x V
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Inversely proportional to length and proportional to c.s.a
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Proportional to the length and inversely proportional to the c.s.a
Questão 29
Questão
What is the formula for two resistors in parallel?
Responda
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R1 + R2/R1 - R2
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R1 - R2/R1 x R2
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R1 + R2/R1 x R2
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R1 x R2/R1 + R2
Questão 30
Questão
When the current through a conductor increases
Responda
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the voltage decreases
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the temperature decreases
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the temperature increases
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the resistance decreases
Questão 31
Questão
The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
Responda
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14V
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20V
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12V
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10V
Questão 32
Questão
The equation for current flowing in a resistive circuit is
Responda
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I = R/P
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I = R/V
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I = P/R
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I = V/R
Questão 33
Questão
The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is
Responda
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50 Ohms
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45 Ohms
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15 Ohms
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55 Ohms
Questão 34
Questão
When an electric current flows through a conductor it
Responda
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Cools down and expands
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Cools down and contracts
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Heats up and contracts
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Heats up and expands
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