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Questions and Answers
What is electric current?
Orderly flow of electrons in a conductor per unit time (or) rate of flow of charges in a conductor.
What is a switch?
Conducting link between cell and bulb.
What is an electric circuit?
Continuous and closed path of an electric current.
What symbol is used to represent electric current?
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What symbol is used to represent electric charge?
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What brings the electrons in order?
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What is the formula to find the electric current in a conductor?
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What is the SI unit of electric charge?
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What is the SI unit of electric current?
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What instrument is used to measure electric current?
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Define one ampere.
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How is an ammeter connected in a circuit?
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What is the conventional direction of electric current?
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What are the two types of electric charges?
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What is the number of negative electric charge in a circuit?
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What is the formula to find electric charge if the total number of charges is given?
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How many charge carriers constitute one coulomb of charges?
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What is the range of an ammeter?
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What is electric potential?
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What is the formula to find Electric Potential?
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Which charge has higher potential?
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What is the SI unit of potential difference?
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What instrument is used to measure potential difference?
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How is a voltmeter connected in a circuit?
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What is the range of a voltmeter?
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Study Notes
Electric Current
- Electric current refers to the orderly flow of electrons in a conductor over time.
- It is quantified as the rate of flow of electric charges through a conductor.
Switch
- A switch acts as a conducting link between the cell and the bulb, enabling control over the circuit.
Electric Circuit
- An electric circuit is a continuous and closed path that allows electric current to flow.
Symbols in Electricity
- The symbol "I" represents electric current.
- The symbol "Q" represents electric charge.
Battery Function
- A battery is responsible for bringing electrons into an organized flow in a circuit.
Current Calculation
- Electric current (I) can be calculated using the formula: I = Q/t, where Q is the charge and t is time.
Units of Measurement
- The SI unit of electric charge is the coulomb (C).
- The SI unit of electric current is the ampere (A).
Measuring Instruments
- An ammeter is an instrument used to measure electric current.
- An ammeter must be connected in series within a circuit to measure current accurately.
Definition of Ampere
- One ampere is defined as the flow of one coulomb of charge per second.
Electric Charge Types
- There are two types of electric charges: positive and negative.
Charge Carriers
- The charge of a single negative electric charge is -1.6 × 10⁻¹⁹ C.
- To find total electric charge (Q) based on the number of charges (n), use the formula Q = ne, with e being -1.6 × 10⁻¹⁹.
- One coulomb of charge is constituted by approximately 6 × 10¹⁸ charge carriers.
Electric Potential
- Electric potential is the work needed to move a unit charge from one point to another within an electric field.
- The formula for electric potential (V) is V = W/Q, where W is work done and Q is charge.
Charge Potential
- Positive charges are considered to have a higher potential compared to negative charges.
Potential Difference Measurement
- The SI unit of potential difference is joule/coulomb, commonly referred to as a volt (V).
- A voltmeter measures potential difference and is connected in parallel to the circuit for accurate readings.
Instrument Ranges
- The typical range for an ammeter is 2 A.
- The range for a voltmeter is typically 10 V, allowing for a measurement of potential difference between points in a circuit.
Studying That Suits You
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Description
Explore essential terminology in electricity with this set of flashcards designed for Class 10 students. Each card features a key term along with its definition to help reinforce your understanding of electric current, circuits, and more. Perfect for quick revisions and test preparations.