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WorksheetsGrade 4: Electronic Playground using Resistors and LDR
Total questions: 10
Worksheet time: 5mins
What does LDR stand for?
Light Dependent Resistor
Low Dim Resistor
Long Distance Receiver
Light Direct Receiver
What happens to an LDR when light falls on it?
Its resistance increases
Its resistance decreases
It starts glowing
It makes sound
What is the use of a resistor in a circuit?
To increase brightness
To control the flow of current
To make sound
To store electricity
In which condition does an LDR have high resistance?
In bright light
In darkness
In water
In wind
10k ohm stands for:
10 ohms
100 ohms
1,000 ohms
Which of these can change its resistance with light?
LED
LDR
Battery
Switch
Why are we using an electronic playground?
To play video games
To learn and test electronic circuits safely
To charge our phone
To make sounds and lights for fun only
Why do we need patch cords?
To connect different components in the circuit
To store current
To make sound
To glow like a light
What unit is used to measure resistance?
Volt
Ohm
Ampere
Watt
Which of the following is an application of automatic street lights?
Automatic street lights
Electric fan speed control
Water pump system
Sound alarm
