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Physics Chapter 11 : Topic 10
Kirchhoff’s Second Law
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Kirchhoff’s second law states that the algebraic sum of potential differences around a closed loop is:
Reasoning: Kirchhoff’s second law states that the sum of all $\mathbf{EMFs}$ and potential drops in a closed loop is zero because energy gained equals energy lost.
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Kirchhoff’s second law is based on the principle of conservation of:
Reasoning: The law follows from conservation of energy because the energy supplied by sources in a loop must equal the energy consumed by circuit elements.
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When a charge moves around a complete circuit loop, the total work done on the charge is:
Reasoning: After completing one loop, the charge returns to its original potential, so the net energy change is zero.
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In applying Kirchhoff’s second law, the sum of $\mathbf{EMFs}$ in a closed loop is equal to:
Reasoning: Energy supplied by batteries $\mathbf{(EMFs)}$ is equal to energy lost across resistors and other components.
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Which mathematical expression represents Kirchhoff’s second law?
Reasoning: Kirchhoff’s voltage law states that the algebraic sum of all voltages around a closed path is zero.
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A battery raises the potential energy of charges in a circuit. According to Kirchhoff’s second law, this energy is:
Reasoning: Electrical energy supplied by the battery is converted into heat, light, mechanical energy, etc.
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A student moves a charge around a closed loop containing a battery and resistors. The energy gained from the battery equals:
Reasoning: The law ensures that energy supplied by the source is completely accounted for by energy dissipated in circuit components.
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The reason Kirchhoff’s second law can be applied to any closed circuit loop is that:
Reasoning: The law is a direct consequence of energy conservation, which applies to all closed systems.
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In a circuit loop, if the total $\mathbf{EMF}$ is $\mathbf{12\ V}$, the total potential drop across resistors must be:
Reasoning: According to Kirchhoff’s second law, total voltage rise equals total voltage drop in a closed loop.
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While moving around a circuit loop, a resistor causes:
Reasoning: A resistor converts electrical energy into heat energy, causing a potential drop.
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If a circuit contains two batteries providing energy and several resistors consuming energy, Kirchhoff’s second law ensures that:
Reasoning: The law balances energy gained from sources with energy lost in circuit components.
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Kirchhoff’s second law differs from Ohm’s law because Kirchhoff’s second law:
Reasoning: Ohm’s law applies to individual components, while Kirchhoff’s second law applies to entire closed loops.
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When applying Kirchhoff’s second law, a voltage rise is usually taken as:
Reasoning: Moving from negative to positive terminal of a battery represents an increase in potential energy and is taken as positive.
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When passing through a resistor in the direction of current, the potential change is considered:
Reasoning: Moving through a resistor in the direction of current results in a potential drop.
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The physical meaning of Kirchhoff’s second law is that:
Reasoning: The law ensures that electrical energy is conserved during movement of charges in a circuit.
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A closed loop contains a battery of $\mathbf{e.m.f.}$ $\mathbf{9\ V}$ and resistors causing drops of $\mathbf{3\ V\ }$and $\mathbf{6\ V}$. This situation satisfies Kirchhoff’s second law because:
Reasoning: The algebraic sum of voltage rises and drops around a loop must equal zero.
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If Kirchhoff’s second law were violated in a circuit, it would mean:
Reasoning: Violation of the law would imply that electrical energy is being created or destroyed.
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A battery in a circuit is considered a source of:
Reasoning: A battery converts chemical energy into electrical energy that drives charges through the circuit.
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Kirchhoff’s second law is especially useful for analyzing:
Reasoning: It helps determine unknown currents and voltages in complex circuits containing multiple loops.
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The conservation principle behind Kirchhoff’s second law means that:
Reasoning: Charges gain energy from sources and lose it in circuit components, maintaining total energy balance.
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In a closed loop, the algebraic sum of voltage changes is zero because:
Reasoning: After completing a loop, a charge returns to the same potential, so its net energy change is zero.
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Kirchhoff’s second law cannot be explained by conservation of charge because it deals with:
Reasoning: Conservation of charge explains Kirchhoff’s first law, while conservation of energy explains the second law.
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A voltage drop across a resistor represents conversion of electrical energy into:
Reasoning: Resistors dissipate electrical energy mainly as heat.
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In Kirchhoff’s loop equation, changing the direction of traversal around the loop will:
Reasoning: The sign convention may change, but conservation of energy gives the same physical answer.
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The main requirement for applying Kirchhoff’s second law is:
Reasoning: Kirchhoff’s voltage law applies to closed loops where energy changes can be balanced.
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If the energy supplied by a battery is $\mathbf{100\ J}$ in a loop, the total energy converted into heat and other forms must be:
Reasoning: Conservation of energy requires that supplied energy equals consumed energy.
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Which statement correctly describes Kirchhoff’s second law?
Reasoning: Kirchhoff’s second law states conservation of energy in electrical circuits.
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A circuit loop has no battery but contains resistors with current flowing. Kirchhoff’s second law suggests that:
Reasoning: A continuous current requires an energy source to compensate for energy losses in resistors.
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The term “loop” in Kirchhoff’s second law refers to:
Reasoning: A loop is any closed path through which a charge can travel and return to its starting point.
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Kirchhoff’s second law confirms that an electric circuit behaves according to:
Reasoning: The law ensures that electrical energy is neither created nor destroyed in a circuit.
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