Correct Answer: Electrical energy

Solution : The correct option is electrical energy.

The photovoltaic effect is a mechanism used by photovoltaic cells, also referred to as solar cells, to transform light energy from the sun directly into electrical energy. When photons, the light particles hit a solar cell's surface, their energy is transferred to the material's electrons, causing this effect.  These electrons get activated by the energy of the photons, which causes them to flow as an electric current. The generated current can then be harnessed and used to power electrical equipment, or it can be stored in batteries for later use.
 

Hello,

Hope you are doing great.

I regret to inform you that, you cannot apply for the DRDO exam by way of Mechanical Engineering course. As the application will ask you for the Btech degree in Mechanical Engineering. So, you only have two options now. You can either start the Mechanical Course freshly, or you can join DRDO from your stream itself.

Hope this helps!!

Correct Answer: Mother

Solution : Following the instructions of the question, the family tree will be –

Here, the quadrilateral represents the male and the circular figure represents the female in the figure.

So, Sarika is the mother of the boy. Hence, the fourth option is correct.

Correct Answer: Ensure transparency and responsibility

Solution : The correct answer is (c) Ensure transparency and responsibility

Accountability is crucial in Citywide Services to ensure transparency and responsibility. It helps ensure that actions and decisions are transparent, and individuals or entities are held responsible for their roles and obligations. This promotes trust, fairness, and efficiency in the provision of services to the city's residents. It does not aim to promote excessive centralization but rather to establish clear lines of responsibility and promote good governance. It's also focused on transparency and responsibility rather than reducing centralization or improving employee morale, although these can be potential outcomes of a culture of accountability.

Correct Answer: Deepak

Solution : Given:
(I) Rohit is second to the left of Virat. Virat is fourth to the right of Deepak.

(II) Hardik is to the immediate left of Deepak. Surya is not an immediate neighbour of Rohit. Rishabh is second to the right of Hardik.

So, Deepak is the immediate neighbour of Hardik and Rishabh. Hence, the third option is correct.

Correct Answer: The truck has been repaired by Mandeep.

Solution : The correct choice is the third option.

Passive voice is the voice in which the object experiences an action rather than the person who performs the action. Hence, the object in the active voice becomes the subject in the passive voice.

The structure of the passive voice in the case of the present perfect tense is: "Singular object + has + been + past participle form of the main verb + 'by' followed by the agent of the action."

Therefore, the sentence in passive voice is: The truck has been repaired by Mandeep.

Correct Answer: Electrical impulses

Solution : The correct option is Electrical impulses.

Electrical impulses or action potentials are used by the brain to transmit signals. These are fast changes in the electrical potential across neuron cell membranes that allow communication, and information transmission between different regions of the nervous system, and throughout the body.

Correct Answer: Natural resources and ecological factors

Solution : The correct answer is (D) Natural resources and ecological factors

The natural environment of business includes factors related to natural resources and ecological considerations. This environment encompasses issues related to environmental sustainability, climate change, resource availability, and other ecological factors that can impact businesses and their operations. 

Correct Answer: India

Solution : Labour intensive economy is an economy in which more labour and less of capital goods are used like in India. Hence, the correct option is 1.

Correct Answer: Chemical energy into electrical energy

Solution : The correct answer is Chemical energy into electrical energy.

In a battery, chemical energy is converted into electrical energy. This process involves a chemical reaction within the battery's cells. The chemical components of the battery, such as the anode and cathode, undergo reactions that release electrical energy. When the battery is connected to a device or a circuit, this electrical energy is then used to power electronic devices, such as flashlights, smartphones, or other portable gadgets.