The correct answer is Ammonium chloride (option C). In a normal dry cell, such as the standard alkaline battery commonly used in household devices, the electrolyte consists of a paste composed mainly of ammonium chloride (NH4Cl) mixed with zinc chloride (ZnCl2). This paste serves several critical fuRead more
The correct answer is Ammonium chloride (option C). In a normal dry cell, such as the standard alkaline battery commonly used in household devices, the electrolyte consists of a paste composed mainly of ammonium chloride (NH4Cl) mixed with zinc chloride (ZnCl2). This paste serves several critical functions: it provides ionic conductivity necessary for the electrochemical reactions to occur, helps maintain the cell’s internal chemistry, and contributes to the overall performance and lifespan of the battery. The electrolyte interacts with the anode (typically zinc) and cathode (usually manganese dioxide), facilitating the flow of ions and electrons essential for generating electrical power. Understanding the composition and role of the electrolyte in dry cells is fundamental for optimizing battery performance and ensuring reliable operation in various applications, from portable electronics to automotive and industrial uses.
The correct answer is: Four times of the previous (option B). The resistance of a wire is directly proportional to its length. Doubling the length of the wire from L to 2L will result in four times the resistance of the original wire. This relationship arises because resistance is a measure of how mRead more
The correct answer is: Four times of the previous (option B). The resistance of a wire is directly proportional to its length. Doubling the length of the wire from L to 2L will result in four times the resistance of the original wire. This relationship arises because resistance is a measure of how much a material opposes the flow of electric current, and longer wires offer more opposition to current flow compared to shorter wires of the same material and cross-sectional area. Therefore, stretching the wire to twice its original length increases its resistance by a factor of four. This principle is crucial in designing and analyzing electrical circuits, where the length of conductors impacts the overall performance and efficiency of the system.
The correct answer is Ohm-meter (option B). Specific resistance, or resistivity, is a fundamental property of materials that quantifies their ability to resist the flow of electric current. It is expressed in ohm-meters (Ω·m) in the International System of Units (SI). Resistivity is intrinsic to eacRead more
The correct answer is Ohm-meter (option B). Specific resistance, or resistivity, is a fundamental property of materials that quantifies their ability to resist the flow of electric current. It is expressed in ohm-meters (Ω·m) in the International System of Units (SI). Resistivity is intrinsic to each material and depends on factors such as its composition and temperature. Materials with high resistivity, such as insulators, impede the flow of current more effectively than materials with low resistivity, such as metals. The ohm-meter unit signifies the resistance across a unit length of material with a unit cross-sectional area, providing a standardized measure for comparing and designing electrical conductors, semiconductors, and insulators. Understanding resistivity is crucial for selecting appropriate materials in electrical and electronic applications to ensure efficient and reliable performance while minimizing energy losses and heat generation.
The correct answer is both current and voltage (option D). Ohm's law describes the fundamental relationship between voltage and current in an electrical circuit. It states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, given a constantRead more
The correct answer is both current and voltage (option D). Ohm’s law describes the fundamental relationship between voltage and current in an electrical circuit. It states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, given a constant temperature (R is the constant of proportionality, known as resistance). This law applies to a wide range of conductive materials and helps in understanding how voltage influences current flow through resistive elements. Ohm’s law is fundamental for analyzing and designing electrical circuits, determining the behavior of resistors, and calculating the power dissipation in circuits. It provides a foundational principle for engineers and technicians to predict and control current levels in various applications, from household electronics to complex industrial systems. Understanding Ohm’s law is crucial for ensuring the efficient and safe operation of electrical devices and systems.
The correct answer is will become sixteen times (option D). Resistance of a wire is inversely proportional to the cross-sectional area of the wire, which is directly proportional to the square of its radius. Halving the radius of a wire decreases its cross-sectional area by a factor of four (since aRead more
The correct answer is will become sixteen times (option D). Resistance of a wire is inversely proportional to the cross-sectional area of the wire, which is directly proportional to the square of its radius. Halving the radius of a wire decreases its cross-sectional area by a factor of four (since area is proportional to the square of the radius). As resistance is inversely proportional to the area, the resistance will increase by a factor of four squared, which is sixteen. Therefore, if the radius of a wire is halved, its resistance will increase sixteen times. This relationship is important in understanding how the physical dimensions of a conductor affect its electrical properties, such as resistance, in electrical and electronic applications.
In a normal dry cell, the electrolyte is
The correct answer is Ammonium chloride (option C). In a normal dry cell, such as the standard alkaline battery commonly used in household devices, the electrolyte consists of a paste composed mainly of ammonium chloride (NH4Cl) mixed with zinc chloride (ZnCl2). This paste serves several critical fuRead more
The correct answer is Ammonium chloride (option C). In a normal dry cell, such as the standard alkaline battery commonly used in household devices, the electrolyte consists of a paste composed mainly of ammonium chloride (NH4Cl) mixed with zinc chloride (ZnCl2). This paste serves several critical functions: it provides ionic conductivity necessary for the electrochemical reactions to occur, helps maintain the cell’s internal chemistry, and contributes to the overall performance and lifespan of the battery. The electrolyte interacts with the anode (typically zinc) and cathode (usually manganese dioxide), facilitating the flow of ions and electrons essential for generating electrical power. Understanding the composition and role of the electrolyte in dry cells is fundamental for optimizing battery performance and ensuring reliable operation in various applications, from portable electronics to automotive and industrial uses.
See lessThe length of a wire is L meter, the wire is stretched to make its length 2L, now the resistance of the wire will be
The correct answer is: Four times of the previous (option B). The resistance of a wire is directly proportional to its length. Doubling the length of the wire from L to 2L will result in four times the resistance of the original wire. This relationship arises because resistance is a measure of how mRead more
The correct answer is: Four times of the previous (option B). The resistance of a wire is directly proportional to its length. Doubling the length of the wire from L to 2L will result in four times the resistance of the original wire. This relationship arises because resistance is a measure of how much a material opposes the flow of electric current, and longer wires offer more opposition to current flow compared to shorter wires of the same material and cross-sectional area. Therefore, stretching the wire to twice its original length increases its resistance by a factor of four. This principle is crucial in designing and analyzing electrical circuits, where the length of conductors impacts the overall performance and efficiency of the system.
See lessThe SI unit of specific resistance is
The correct answer is Ohm-meter (option B). Specific resistance, or resistivity, is a fundamental property of materials that quantifies their ability to resist the flow of electric current. It is expressed in ohm-meters (Ω·m) in the International System of Units (SI). Resistivity is intrinsic to eacRead more
The correct answer is Ohm-meter (option B). Specific resistance, or resistivity, is a fundamental property of materials that quantifies their ability to resist the flow of electric current. It is expressed in ohm-meters (Ω·m) in the International System of Units (SI). Resistivity is intrinsic to each material and depends on factors such as its composition and temperature. Materials with high resistivity, such as insulators, impede the flow of current more effectively than materials with low resistivity, such as metals. The ohm-meter unit signifies the resistance across a unit length of material with a unit cross-sectional area, providing a standardized measure for comparing and designing electrical conductors, semiconductors, and insulators. Understanding resistivity is crucial for selecting appropriate materials in electrical and electronic applications to ensure efficient and reliable performance while minimizing energy losses and heat generation.
See lessWhat does Ohm’s law define?
The correct answer is both current and voltage (option D). Ohm's law describes the fundamental relationship between voltage and current in an electrical circuit. It states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, given a constantRead more
The correct answer is both current and voltage (option D). Ohm’s law describes the fundamental relationship between voltage and current in an electrical circuit. It states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, given a constant temperature (R is the constant of proportionality, known as resistance). This law applies to a wide range of conductive materials and helps in understanding how voltage influences current flow through resistive elements. Ohm’s law is fundamental for analyzing and designing electrical circuits, determining the behavior of resistors, and calculating the power dissipation in circuits. It provides a foundational principle for engineers and technicians to predict and control current levels in various applications, from household electronics to complex industrial systems. Understanding Ohm’s law is crucial for ensuring the efficient and safe operation of electrical devices and systems.
See lessIf the radius of a wire is halved, then its resistance will
The correct answer is will become sixteen times (option D). Resistance of a wire is inversely proportional to the cross-sectional area of the wire, which is directly proportional to the square of its radius. Halving the radius of a wire decreases its cross-sectional area by a factor of four (since aRead more
The correct answer is will become sixteen times (option D). Resistance of a wire is inversely proportional to the cross-sectional area of the wire, which is directly proportional to the square of its radius. Halving the radius of a wire decreases its cross-sectional area by a factor of four (since area is proportional to the square of the radius). As resistance is inversely proportional to the area, the resistance will increase by a factor of four squared, which is sixteen. Therefore, if the radius of a wire is halved, its resistance will increase sixteen times. This relationship is important in understanding how the physical dimensions of a conductor affect its electrical properties, such as resistance, in electrical and electronic applications.
See less