During energy transformation some form of energy is given out without it being used anywhere. such an energy is called ........

Options

A. backup energy
B. stored energy
C. wasteful energy
D. dissipated form of energy.

Explanation

To solve the question, let's break it down step by step:

### Step 1: Understand the Concept of Energy Transformation
When energy changes from one form to another, it is called energy transformation. For example, when electrical energy is converted into mechanical energy in a motor.

**Hint:** Think about how energy changes forms in everyday devices.

### Step 2: Recognize the Law of Conservation of Energy
The law of conservation of energy states that energy cannot be created or destroyed; it can only be transformed from one form to another. Therefore, the total energy before and after the transformation remains constant.

**Hint:** Remember that energy is always conserved; it just changes forms.

### Step 3: Identify the Inefficiencies in Energy Transformation
In real-life applications, machines and systems do not operate at 100% efficiency. This means that not all the input energy is converted into useful output energy. Some energy is lost in the process, often as heat or sound.

**Hint:** Consider why machines might not work perfectly and what happens to the energy that isn't used.

### Step 4: Define the Type of Energy That is Not Used
The energy that is transformed but not utilized for useful work is often referred to as "waste energy" or "dissipated energy." This energy is not harnessed for any productive purpose and is considered a loss in the system.

**Hint:** Think about what happens to energy that is not effectively used in a process.

### Step 5: Choose the Correct Answer
From the options provided:
- Backup energy
- Stored energy
- Wasteful energy
- Dissipated form of energy

The correct term for energy that is given out during transformation without being used is "dissipated form of energy."

**Hint:** Look for the term that best describes energy that is lost and not utilized.

### Final Answer
The correct answer is **dissipated form of energy**.