WorksheetsChapter 1 - 4001 FTE Tutorial 2
Total questions: 29
Worksheet time: 15mins
What is the unit of resistance?
Volts
Watts
Amperes
Ohms
What does resistance restrict in a conductive material?
Voltage
Current
Electrons
Power
Which component is specifically designed to have a certain amount of resistance?
Resistor
Transformer
Inductor
Capacitor
What is the first digit represented by in the resistor color code?
1st digit
Multiplier
Tolerance
2nd digit
What happens to resistance as the length of a conductor increases?
It remains constant
It fluctuates
It decreases
It increases
What is the relationship between resistance and cross-sectional area?
Inversely proportional
Directly proportional
No relationship
Exponential
What is the symbol for resistivity?
R
Ω
ρ
α
Which material has low resistivity?
Copper
Mica
Rubber
Paper
What is the temperature coefficient of resistance?
A measure of power
A measure of current
A measure of voltage
A measure of resistance
If the temperature of a conductor increases, what generally happens to its resistance?
It decreases
It fluctuates
It remains constant
It increases
What is the formula for resistance in terms of resistivity?
R = ρl/A
R = ρA/l
R = l/ρA
R = A/ρl
What does the third band in a resistor color code represent?
2nd digit
1st digit
Multiplier
Tolerance
What is the effect of temperature on insulators?
Resistance increases
Resistance remains constant
Resistance decreases
Resistance fluctuates
What is the resistance of a copper wire at 20°C if its temperature coefficient is 0.004/°C?
10Ω
1Ω
0.1Ω
100Ω
What is the formula to calculate resistance at a different temperature?
Rθ = R0(1 + α0θ)
Rθ = R0(1 - α0θ)
Rθ = R0(α0 + θ)
Rθ = R0(θ/α0)
What happens to the resistance of a wire if its diameter is doubled?
It quadruples
It remains the same
It halves
It doubles
What is the purpose of a variable resistor?
To provide adjustable resistance
To provide fixed resistance
To store energy
To convert voltage
What is the resistance of a wire if its length is halved?
It quadruples
It remains the same
It doubles
It halves
What is the resistance of a material at 0°C called?
Rθ
R0
R1
R2
What is the effect of increasing temperature on most conductors?
Resistance decreases
Resistance increases
Resistance remains constant
Resistance fluctuates
What is the resistance of a 1200m copper cable with a diameter of 12mm?
2.8×10−8Ω
1.7×10−8Ω
2.8Ω
1.7Ω
What does the term 'resistivity' refer to?
The opposition to current flow
The measure of voltage
The ability to conduct electricity
The measure of power
What is the relationship between resistance and temperature coefficient?
Exponential
No relationship
Inversely proportional
Directly proportional
What is the resistance of a coil of copper wire at 100°C if it is 10Ω at 20°C?
9.57Ω
10.43Ω
10.04Ω
11.00Ω
What is the primary function of a resistor in a circuit?
To limit current
To store energy
To decrease power
To increase voltage
What does the term 'collisions' refer to in the context of resistance?
Electrons colliding with atoms
Atoms colliding with each other
Protons colliding with neutrons
Electrons colliding with protons
What is the effect of increasing the cross-sectional area of a conductor?
Resistance remains constant
Resistance decreases
Resistance fluctuates
Resistance increases
What is the resistance of a material at a given temperature called?
R2
R1
R0
Rθ
What is the primary purpose of resistors in electronic circuits?
To store energy
To limit current and divide voltage
To increase power
To convert AC to DC
