The question asks how electric current can be represented. We need to identify the standard method used in electrical engineering and physics to depict electrical circuits and the flow of current within them.
A) Circuit diagram is the correct answer because electric current, along with other electrical components and their connections, is conventionally represented using circuit diagrams. These diagrams use standardized symbols to illustrate the path and flow of current in an electrical circuit.
This question tests fundamental knowledge of the relationship between electricity and magnetism. The key concept here is Oersted's discovery, which established that electric currents produce magnetic fields.
C) Magnet — When electric current flows through a wire, it creates a magnetic field around it, causing the wire to behave like a magnet. This phenomenon is known as the magnetic effect of electric current.
The question asks us to evaluate statements about Radioisotope Thermoelectric Generators (RTGs). We need to determine which of the given statements are correct based on the principles and applications of RTGs.
Based on the analysis, statements 2 and 3 are correct, while statement 1 is incorrect.
Correct Option: B) 2 and 3 only
| List I-Subatomic Particles | List II-Charges |
| a) Protons | 1.) Positively charged |
| b) Electrons | 2.) Negatively charged |
| c) Neutron | 3.) Neutral |
The question asks to match subatomic particles with their respective charges. This requires basic knowledge of the properties of protons, electrons, and neutrons.
A) a-1, b-2, c-3 is the correct option because it accurately pairs each subatomic particle with its characteristic charge: protons are positively charged, electrons are negatively charged, and neutrons are neutral.
The question asks for the components that constitute a 'nucleon'. This requires knowledge of basic atomic structure and terminology.
Correct Option: B) Protons and Neutrons
A nucleon is defined as either a proton or a neutron, the two types of particles that make up the atomic nucleus. The number of nucleons in an atom's nucleus is its mass number (A).
The question asks to identify which of the listed inventions was NOT made by Thomas Alva Edison. To answer this, we need to recall the major inventions attributed to Thomas Edison and compare them with the given options.
Based on the above, all three inventions listed (Electric bulb, Gramophone/Phonograph, and Motion picture camera) are indeed credited to Thomas Alva Edison or his laboratory.
The question asks which of the given options is not an invention of Thomas Alva Edison. As established in the step-by-step analysis, all three listed items (Electric bulb, Gramophone/Phonograph, and Motion picture camera) are inventions attributed to Thomas Alva Edison or his laboratory. Therefore, none of them are "not" his invention. This means that "All the above" is the correct answer, implying that the premise of the question (that one of them is NOT his invention) is flawed, or rather, the question is asking to select the option that correctly states that all the listed items are indeed his inventions, thus making none of them an exception.