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4. What type of energy does a motor convert into mechanical energy?
i) Chemical energy ii) Electrical energy

iii) Thermal energy iv) Light energy

5. What is a common use of LDR in everyday devices?
i) To control the volume

ii) To turn on lights automatically in the dark

iii) To make noise

iv) To measure weight

B. State whether the following statements are true (T) or false (F).
1. An LED emits light when electricity flows through it.
2. A potentiometer is also known as a variable resistor.

3. Motors are used to measure temperature in electronic devices.
4. An LDR increases its resistance in bright light.

5. A motor converts electrical energy into sound energy.
C. Fill in the blanks.

simple current speed circuit brightness

1. When you turn the switch to the “on” position, it completes the in the circuit.
2. he brightness of an LED can be increased by allowing more to flow through it.

3. To create a LED circuit, connect a switch in series with the LED.
4. The of an LED is affected by how much current is allowed to flow through it.

5. A fan speed dimmer controls the of the fan by adjusting the potentiometer.

21 st
Try It Yourself Activity Century #Creativity
#Technology Literacy
Skills
Make your own circuit with the LDR and Buzzer.

ASSESSMENT

Write down your thoughts that how electronics can be beneficial for the
physically challenged people.

Hands-On Activities with Tinker Orbits Kit 23