Test
Principles of basic electrical circuits
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Preguntas del test (34)
1Look at the following question
- A0.356 Ω
- B0.536 Ω
- C0.178 Ω
- D0.235 Ω
2Answer the following question
- A50 m
- B25 m
- C30 m
- D40 m
- A50 m
3Answer the following questions
- A0.065 Ω
- B0.552 Ω
- C0.045 Ω
- D0.055 Ω
- A0.065 Ω
4Which of the following formulas can calculate power in a resistive circuit
- A
- B
- C
- D
- A
53 x 12Ω resistors are connected in parallel to a 200V supply, calculate the total power of the circuit.
- A10,000W
- B400W
- C1,000W
- D1,111W
6Two 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:
- A20 A
- B2 A
- C5 A
- D0.5 A
7If three resistors are connected in series and have resistances of 20 Ω, 30 Ω, and 40 Ω then the total resistance would be
- A100 Ω
- B90 Ω
- C70 Ω
- D80 Ω
83 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of the circuit.
- A10 KW
- B0.666 KW
- C0.333 KW
- D12 KW
9For the circuit shown the total resistance is
- A10 Ω
- B15 Ω
- C100 Ω
- D90 Ω
10To measure the current through a load the meter must be connected
- Aacross the load
- Bin parallel with the supply
- Cin parallel with the load
- DIn series with the load
11To measure the voltage across a load the meter must be connected
- Abefore the load
- Bin parallel with the supply
- Cin parallel with the load
- DIn series with the load
12In the diagram below if I1 and I2 are ammeter readings then
- AI2 will be greater than I1
- BI1 will be greater than I2
- CI1 will be equal to I2
- DI1 will be half I2
13In the diagram below instrument A measures
- Athe current through R3
- Bthe current through R1 and R2
- Cthe volt drop across R1 and R2
- Dthe volt drop across R1 and R3
14In the diagram below instrument B measures
- Athe current through R3
- Bthe current through R1
- Cthe volt drop across R1 and R2
- Dthe volt drop across R1
15Instrument A measures
- Acurrent through a resistor
- Bsupply current
- CVoltage across a resistor
- Dsupply voltage
16Instrument E measures
- Acurrent through a resistor
- Bsupply current
- CVoltage across a resistor
- Dsupply voltage
17For the circuit shown above the total current is
- A0.1A
- B10A
- C20A
- D1.1A
18If four resistors each of 50 Ω are connected in parallel the overall resistance is
- A25 Ω
- B100 Ω
- C12.5 Ω
- D200 Ω
19Which of the instrument numbers would measure current
- Anone of them
- B1 and 3
- C2 and 3
- D1
20Which of the instrument numbers would measure voltage
- Anone of them
- B3
- C2
- D1
21When current flows in a conductor, a magnetic field is created around the conductor
- Awhen the voltage is high enough
- Bonly if it is a coil
- Cas long as the current flows
- Donly when d.c is applied
22Meter M1 will measure
- Athe supply current
- Bthe current through R1
- Cthe volt drop across R1 and R2
- Dthe volt drop across R1
23Meter M2 will measure
- Athe supply current
- Bthe current through R1
- Cthe volt drop across R2 and R3
- Dthe supply voltage
24Instrument 4 is measuring
- Athe supply current
- Bthe current through the resistor
- Cthe supply voltage
- Dthe voltage across the resistor
25Instrument 2 above is measuring
- Athe supply current
- Bthe current through the resistor
- Cthe supply voltage
- Dthe voltage across the resistor
26Of the following materials which would be the BEST conductor of electricity?
- ANichrome
- BSteel
- CAluminium
- DCopper
27A poor conductor of electricity is:
- AGlass
- BCopper
- CAluminium
- DSilver
28The resistance of an electrical conductor is:
- AAffected by the weather
- BDetermined by the formula I = P x V
- CInversely proportional to length and proportional to c.s.a
- DProportional to the length and inversely proportional to the c.s.a
29What is the formula for two resistors in parallel?
- AR1 + R2/R1 - R2
- BR1 - R2/R1 x R2
- CR1 + R2/R1 x R2
- DR1 x R2/R1 + R2
30When the current through a conductor increases
- Athe voltage decreases
- Bthe temperature decreases
- Cthe temperature increases
- Dthe resistance decreases
31The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
- A14V
- B20V
- C12V
- D10V
32The equation for current flowing in a resistive circuit is
- AI = R/P
- BI = R/V
- CI = P/R
- DI = V/R
33The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is
- A50 Ohms
- B45 Ohms
- C15 Ohms
- D55 Ohms
34When an electric current flows through a conductor it
- ACools down and expands
- BCools down and contracts
- CHeats up and contracts
- DHeats up and expands
Información
- Descripción
- 2 Electrical Science Test sobre Principles of basic electrical circuits, creado por Vito Martino el 09/05/2014.
- Autor
- Vito Martino
- Idioma
- English
- Visitas
- 3.135
- Etiquetas
- Valoración
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