Consider the following statements and select the correct answer from the codes given below:
1. In a solar cooker, a concave mirror is used.
2. In a loudspeaker, electrical energy is converted into sound energy.
3. In a motor, electrical energy is converted into mechanical energy.
Codes:

Correct option is D

In a solar cooker, a concave mirror is used: Concave mirrors are used in solar cookers to focus sunlight at a single point, thereby increasing the temperature to cook food.

In a loudspeaker, electrical energy is converted into sound energy: In a loudspeaker, an electrical signal causes a diaphragm to vibrate, producing sound waves (conversion of electrical energy into sound energy).

In a motor, electrical energy is converted into mechanical energy: An electric motor converts electrical energy into mechanical energy by generating rotational motion.