‎⁨المستند (1)⁩.pdf

**?What are the components of a source-free R-C circuit.1** A) Resistance (R) and Current (C) **B) Resistance (R) and Capacitance (C)** C) Resistance (R) and Inductance (L) D) Resistance (R) and Voltage (V) E) Resistance (R) and Power (P) --- **?What is the time constant in an RC circuit.2** **A)...

**?What are the components of a source-free R-C circuit.1** A) Resistance (R) and Current (C) **B) Resistance (R) and Capacitance (C)** C) Resistance (R) and Inductance (L) D) Resistance (R) and Voltage (V) E) Resistance (R) and Power (P) --- **?What is the time constant in an RC circuit.2** **A) The product of resistance and capacitance** B) The ratio of inductance to resistance C) The voltage across the capacitor D) The voltage across the resistor E) The product of inductance and resistance --- **.Describe the behavior of an RC circuit for t > 0 after disconnecting a voltage source.3** A) The voltage remains constant B) The current increases exponentially **C) The voltage decreases exponentially** D) The resistance decreases E) The current remains constant --- **?What happens to the voltage across a capacitor in a source-free RC circuit over time.4** A) It increases exponentially **B) It decreases exponentially** C) It remains constant D) It oscillates E) It drops to zero instantaneously --- **?What is the significance of the time constant in a first-order circuit.5** A) It represents the time for the current to double B) It defines the rate at which energy is stored **C) It is the time taken for the response to decay by 63%** D) It is the time for the voltage to reach its maximum E) It is the product of voltage and current --- **?How does the current behave in an RL circuit when the switch is opened.6** A) It increases exponentially B) It decreases instantaneously **C) It decreases exponentially** D) It remains constant E) It increases linearly --- What does the voltage across an inductor tend to in an RL circuit as time approaches.7** **?infinity A) It remains constant **B) It decreases to zero** C) It increases exponentially D) It oscillates E) It drops instantaneously --- **.Define the term 'transient response' in an electrical circuit.8** A) The response after the circuit reaches steady state B) The response of a circuit to a sinusoidal source **C) The short-term response immediately after a disturbance** D) The voltage response to a constant source E) The steady-state current response --- **?What is meant by 'steady-state' in a circuit.9** A) The behavior just after a source is applied B) The oscillatory response of a circuit **C) The long-term behavior after transients die out** D) The instantaneous voltage change in a circuit E) The short-term behavior of the circuit --- **?How is the natural response of an RC circuit different from its step response.10** A) It includes both the transient and steady-state components **B) It depends only on initial conditions and no external sources** C) It occurs only when a voltage source is applied D) It occurs when an AC source is connected E) It is not related to the capacitor's behavior --- **?What role does the capacitor play in an RC circuit's energy storage.11** A) It stores energy in the form of current **B) It stores energy in the form of electric charge** C) It dissipates energy as heat D) It stores energy in its magnetic field E) It converts electrical energy to mechanical energy --- **?In an RL circuit, how is energy stored in the inductor dissipated over time.12** A) It is stored permanently B) It is dissipated as heat in the capacitor **C) It is dissipated as heat in the resistor** D) It is converted into mechanical energy E) It is dissipated as current in the voltage source --- **?Why can't the voltage across a capacitor change instantaneously.13** **A) Because the capacitor requires time to charge or discharge** B) Because resistors control the voltage C) Because current cannot flow through capacitors D) Because inductors prevent voltage changes E) Because it depends on the inductor's value --- **.Describe the source-free RL circuit behavior after disconnecting an external source.14** A) The voltage remains constant B) The current increases **C) The current decreases exponentially** D) The voltage increases linearly E) The inductor discharges instantly --- **?How does Kirchhoff's voltage law apply to RC circuits.15** **A) The sum of voltages around any closed loop is zero** B) The sum of currents in a node is equal to zero C) The sum of resistances in a circuit equals zero D) The sum of inductances equals the voltage E) The sum of voltages across the capacitor equals the resistor's voltage --- **?What is the relationship between current and voltage in an RL circuit.16** **A) The current lags the voltage by 90 degrees** B) The voltage leads the current by 90 degrees C) The voltage is in phase with the current D) The current and voltage have no relationship E) The voltage equals the resistance multiplied by the current --- **?Why are RC and RL circuits referred to as first-order circuits.17** A) Because they contain only resistors **B) Because their governing equations are first-order differential equations** C) Because they contain two energy storage elements D) Because their response is instantaneous E) Because they have a first-order resonance frequency -- **?What factors influence the time constant in an RL circuit.18** A) The resistance and voltage **B) The resistance and inductance** C) The capacitance and resistance D) The inductance and capacitance E) The voltage and current --- **?How do dependent sources affect the analysis of source-free circuits.19** **A) They introduce additional variables that must be considered** B) They have no effect in a source-free circuit C) They increase the resistance of the circuit D) They replace the inductors in RL circuits E) They are always eliminated from the analysis --- **.Explain the concept of the 'singularity function' in solving circuit equations.20** A) It refers to the steady-state response of the circuit **B) It represents a sudden change in the circuit's behavior** C) It is the function that describes resonance D) It explains the effect of inductance on voltage E) It represents the time constant