WorksheetsIntroduction to Electronic Measuring Instruments
Total questions: 38
Worksheet time: 6mins
What does a voltmeter measure?
Resistance
Current
Voltage
Temperature
Which of the following is measured in ohms (Ω)?
Voltage
Current
Resistance
Power
What is the function of an ammeter?
Measures resistance
Measures current
Measures voltage
Measures power
A multimeter can measure the following EXCEPT:
Voltage
Resistance
Current
Temperature
The unit used for measuring current is:
Ampere (A)
Volt (V)
Ohm (Ω)
Watt (W)
Which tool should you use to measure how much electrical pressure is in a circuit?
Ammeter
Ohmmeter
Voltmeter
Thermometer
Which tool would you use to measure resistance in a component?
Multimeter set to voltage
Ohmmeter
Voltmeter
Ammeter
Which combination is correctly matched?
Voltmeter – Ohms
Ohmmeter – Volts
Ammeter – Amperes
Multimeter – Temperature
Which instrument gives the most information in one tool?
Ohmmeter
Ammeter
Voltmeter
Multimeter
What is the first thing to check before using any electronic measuring instrument?
If it looks new
The color of the wires
The range setting
The weight of the tool
A circuit has a current of 3 amperes and resistance of 4 ohms. What is the voltage?
(a)
Voltage is also known as:
Resistance
Electrical flow
Electrical pressure
Energy storage
Which of the following flows in a circuit?
Voltage
Resistance
Current
All of the above
The symbol for resistance is:
R
V
I
C
The relationship between voltage, current, and resistance is described by:
Ohm’s Law
Faraday’s Law
Newton’s Law
Kirchhoff’s Rule
What is the formula for Ohm’s Law?
V = P × R
V = I × R
R = V + I
I = V + R
If voltage increases and resistance stays the same, current will:
Stay the same
Decrease
Increase
Disappear
Which unit is used to measure voltage?
A
Ω
V
W
What does a high resistance value mean in a circuit?
Easier flow
Harder flow of current
No electricity
High temperature
A low current in a circuit may be caused by:
Low resistance
High resistance
High voltage
Open circuit
If the voltage is 10V and the current is 2A, what is the resistance?
(a)
Where do you insert the red probe when measuring voltage?
COM
A port
VΩ port
USB port
What happens if you measure resistance in a powered circuit?
More accurate result
The circuit works better
You can damage the meter
Higher resistance is shown
When measuring voltage, the probes should be placed:
Across the terminals
In the battery
In parallel with each other
At the ground
A student wants to measure current. The multimeter must be connected:
In series
In parallel
Randomly
With a switch
What safety rule should be followed?
Touch probe tips when testing
Always use wet hands
Never measure resistance in a live circuit
Use batteries for every test
Which is NOT a correct setting for the multimeter?
Ω for resistance
V for voltage
A for current
W for frequency
Multimeters can measure all of these EXCEPT:
Voltage
Resistance
Temperature
Air pressure
You use a multimeter and measure a resistance of 2Ω with a voltage of 12V. What is the current?
(a)
Which reading would indicate a healthy battery?
0V
1.5V
0.5Ω
0A
What is a possible reason for high resistance?
Short circuit
Corroded wire
Strong current
Good connection
Which reading would show a broken wire?
0V
0Ω
Infinite resistance
12V
Why should you double-check the probe position?
To color-match
To balance the circuit
To avoid wrong readings
To save battery
What will happen if the probes are placed incorrectly?
More accurate results
No effect
Wrong readings or damage
Better flow
What should you do if you get a reading of 0V on a good battery?
Continue using it
Replace the multimeter
Check the probe placement
Cut the wire
After measuring current, what’s next?
Leave it connected
Turn off the circuit
Lick the probe
Plug into outlet
Which of the following is considered a safe practice?
Using metal table while measuring
Measuring with wet hands
Wearing rubber gloves
Using damaged wires
A circuit has a resistance of 10Ω and a current of 0.5A. What is the voltage?
(a)
