NEET Physics: Identification of Diode LED Resistor Capacitor Practice Questions
13 free multiple-choice questions on Identification of Diode LED Resistor Capacitor (Electronics) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The main role of a capacitor in an AC circuit is to store energy by handling the variation in voltage and current across time, rather than purely opposing the DC current flow.
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Correct answer: C — To store electrical energy
Capacitors store energy by accumulating charge, which is essential for dealing with fluctuating AC voltages and managing energy storage in oscillating circuits.
Q2. Which component primarily controls the flow of current by introducing a specific resistance in a circuit?
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Correct answer: B — Resistor
The Resistor is the component designed specifically to oppose the flow of electric current and control the current magnitude according to Ohm's Law.
Q3. In an LED circuit, what characteristic distinguishes an LED from a standard diode?
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Correct answer: C — LED has a specific forward voltage drop for optimal emission
LEDs are diodes, but they operate by light emission. They have a specific forward voltage required to light up, unlike a general diode which simply allows current flow.
Q4. Which electronic component is specifically designed to allow current flow in only one direction, acting as a switch for current flow, and is represented by the symbol containing an arrowhead?
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Correct answer: B — Diode
The component specifically designed to allow current flow in only one direction is the Diode. It acts as a one-way valve for current.
Q5. If a circuit requires a component that regulates the current flow by providing a fixed resistance, which component should be used?
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Correct answer: B — Resistor
A resistor is specifically designed to provide a fixed opposition to the flow of current, thereby regulating the current level according to Ohm's law.
Q6. Which component is essential in a circuit primarily to provide a fixed opposition to current flow and is typically identifiable by its color-coded bands?
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Correct answer: C — Resistor
Resistors are the primary components used to provide fixed resistance and are standardly identified by color codes.
Q7. A component is used in a circuit to limit the flow of current and dissipate power. Which component is this?
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Correct answer: B — Resistor
A resistor limits the flow of current and dissipates the electrical energy as heat, fulfilling its role in current control.
Q8. If a circuit involves a component whose primary role is to limit the current flow independent of the polarity, which component is being used?
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Correct answer: C — Resistor
A resistor's fundamental role is to limit the current flow (Ohm's law), regardless of whether the current direction is forward or reverse across a diode.
Q9. What is the primary function of a Capacitor in an electrical circuit?
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Correct answer: A — To store electrical energy in an electric field
A Capacitor stores electrical energy in the form of an electric field when a voltage is applied across its plates.
Q10. Which of the following components allows current to flow easily in only one direction?
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Correct answer: D — Diode
The Diode is a semiconductor device that acts as a one-way valve, allowing current flow only when it is forward biased.
Q11. Which device is a two-terminal passive component used primarily to store electrical energy in an electric field?
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Correct answer: C — Capacitor
A capacitor is designed to store electrical energy in an electric field.
Q12. If a circuit requires a component to limit the total current flowing through it to protect sensitive parts, which component is most appropriately used?
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Correct answer: B — Resistor
A resistor is used specifically to limit the current flow in a circuit by increasing the opposition to current flow, thereby protecting other components from excessive current.
Q13. In an LED circuit, the diode is used because it exhibits which property?
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Correct answer: C — It emits light when forward biased
LEDs (Light Emitting Diodes) operate based on the phenomenon where the forward-biased diode emits light when current flows through it.
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