# Principles of basic electrical circuits

### Description

2 Electrical Science Quiz on Principles of basic electrical circuits, created by Vito Martino on 09/05/2014.
Quiz by Vito Martino, updated more than 1 year ago
 Created by Vito Martino almost 10 years ago
2818
29

## Resource summary

### Question 1

Question
Look at the following question
Answer
• 0.356 Ω
• 0.536 Ω
• 0.178 Ω
• 0.235 Ω

### Question 2

Question
Answer the following question
Answer
• 50 m
• 25 m
• 30 m
• 40 m

### Question 3

Question
Answer the following questions
Answer
• 0.065 Ω
• 0.552 Ω
• 0.045 Ω
• 0.055 Ω

### Question 4

Question
Which of the following formulas can calculate power in a resistive circuit

### Question 5

Question
3 x 12Ω resistors are connected in parallel to a 200V supply, calculate the total power of the circuit.
Answer
• 10,000W
• 400W
• 1,000W
• 1,111W

### Question 6

Question
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:
Answer
• 20 A
• 2 A
• 5 A
• 0.5 A

### Question 7

Question
If three resistors are connected in series and have resistances of 20 Ω, 30 Ω, and 40 Ω then the total resistance would be
Answer
• 100 Ω
• 90 Ω
• 70 Ω
• 80 Ω

### Question 8

Question
3 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of the circuit.
Answer
• 10 KW
• 0.666 KW
• 0.333 KW
• 12 KW

### Question 9

Question
For the circuit shown the total resistance is
Answer
• 10 Ω
• 15 Ω
• 100 Ω
• 90 Ω

### Question 10

Question
To measure the current through a load the meter must be connected
Answer
• across the load
• in parallel with the supply
• in parallel with the load
• In series with the load

### Question 11

Question
To measure the voltage across a load the meter must be connected
Answer
• before the load
• in parallel with the supply
• in parallel with the load
• In series with the load

### Question 12

Question
In the diagram below if I1 and I2 are ammeter readings then
Answer
• I2 will be greater than I1
• I1 will be greater than I2
• I1 will be equal to I2
• I1 will be half I2

### Question 13

Question
In the diagram below instrument A measures
Answer
• the current through R3
• the current through R1 and R2
• the volt drop across R1 and R2
• the volt drop across R1 and R3

### Question 14

Question
In the diagram below instrument B measures
Answer
• the current through R3
• the current through R1
• the volt drop across R1 and R2
• the volt drop across R1

### Question 15

Question
Instrument A measures
Answer
• current through a resistor
• supply current
• Voltage across a resistor
• supply voltage

### Question 16

Question
Instrument E measures
Answer
• current through a resistor
• supply current
• Voltage across a resistor
• supply voltage

### Question 17

Question
For the circuit shown above the total current is
Answer
• 0.1A
• 10A
• 20A
• 1.1A

### Question 18

Question
If four resistors each of 50 Ω are connected in parallel the overall resistance is
Answer
• 25 Ω
• 100 Ω
• 12.5 Ω
• 200 Ω

### Question 19

Question
Which of the instrument numbers would measure current
Answer
• none of them
• 1 and 3
• 2 and 3
• 1

### Question 20

Question
Which of the instrument numbers would measure voltage
Answer
• none of them
• 3
• 2
• 1

### Question 21

Question
When current flows in a conductor, a magnetic field is created around the conductor
Answer
• when the voltage is high enough
• only if it is a coil
• as long as the current flows
• only when d.c is applied

### Question 22

Question
Meter M1 will measure
Answer
• the supply current
• the current through R1
• the volt drop across R1 and R2
• the volt drop across R1

### Question 23

Question
Meter M2 will measure
Answer
• the supply current
• the current through R1
• the volt drop across R2 and R3
• the supply voltage

### Question 24

Question
Instrument 4 is measuring
Answer
• the supply current
• the current through the resistor
• the supply voltage
• the voltage across the resistor

### Question 25

Question
Instrument 2 above is measuring
Answer
• the supply current
• the current through the resistor
• the supply voltage
• the voltage across the resistor

### Question 26

Question
Of the following materials which would be the BEST conductor of electricity?
Answer
• Nichrome
• Steel
• Aluminium
• Copper

### Question 27

Question
A poor conductor of electricity is:
Answer
• Glass
• Copper
• Aluminium
• Silver

### Question 28

Question
The resistance of an electrical conductor is:
Answer
• Affected by the weather
• Determined by the formula I = P x V
• Inversely proportional to length and proportional to c.s.a
• Proportional to the length and inversely proportional to the c.s.a

### Question 29

Question
What is the formula for two resistors in parallel?
Answer
• R1 + R2/R1 - R2
• R1 - R2/R1 x R2
• R1 + R2/R1 x R2
• R1 x R2/R1 + R2

### Question 30

Question
When the current through a conductor increases
Answer
• the voltage decreases
• the temperature decreases
• the temperature increases
• the resistance decreases

### Question 31

Question
The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
Answer
• 14V
• 20V
• 12V
• 10V

### Question 32

Question
The equation for current flowing in a resistive circuit is
Answer
• I = R/P
• I = R/V
• I = P/R
• I = V/R

### Question 33

Question
The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is
Answer
• 50 Ohms
• 45 Ohms
• 15 Ohms
• 55 Ohms

### Question 34

Question
When an electric current flows through a conductor it
Answer
• Cools down and expands
• Cools down and contracts
• Heats up and contracts
• Heats up and expands

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