# Class 10 Physics Chapter 14 Important Short Questions 2024

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## Class 10 Physics Chapter 14 Important Short Questions

• The time rate of flow of electric charge through any cross-section is called electric current.
• The current due to the flow of positive charge equivalent to the current due to the flow of negative charge in the opposite direction is known as conventional current.
• Ampere is the SI unit of current.
• e.m.f. is the total amount of energy supplied by the battery or the cell in moving one coulomb of positive charge from the -ve to the +ve terminal of the battery.
• Ohm’s law states that the current I passing through a conductor is directly proportional to the potential difference V applied across its ends provided the temperature and physical state of the conductor do not change.
• Resistance R is a measure of opposition to the current flow through a conductor. Its SI unit is ohm. It is denoted by the symbol Ω. When a potential difference of one volt is applied across the ends of a conductor and one ampere of current passes through it, then its resistance will be one ohm.
• Materials in which electrons can freely move so as to pass electricity are called conductors while in insulators no free electrons are available for the conduction of electricity.
• The equivalent resistance R of a series combination of ‘n’ resistances is given by
• The equivalent resistance R of a parallel combination of ‘n’ resistances is given by
• A galvanometer is a sensitive instrument that detects current in a circuit. It is always connected in series with the circuit.
• An ammeter is an electrical instrument that measures a larger current. It is always connected in series in a circuit.
• A voltmeter is an electrical instrument used to measure the potential difference between two points in a circuit. It is always connected parallel to a circuit component.
• The amount of heat energy generated in a resistance due to the flow of electric current is equal to the product of the square of current, resistance, and the time interval ( W 2= I Rt). This is called Joule’s law.
• kilowatt-hour is the amount of energy obtained from a source of one kilowatt in one hour. It is equal to 3.6 megajoules.
• The current that does not change its flow direction is known as direct current or d.c.
• The current that changes its flow direction after regular intervals of time is known as alternating current or a.c.

### REVIEW QUESTIONS

• Define and explain the term electric current.
• What is the difference between electronic current and conventional current?
• What do we mean by the term e.m.f? Is it really a force? Explain.
• How can we differentiate between e.m.f. and potential difference?
• Explain Ohm’s law. What are its limitations?
• Define resistance and its units.
• What is the difference between conductors and insulators?
• Explain the energy dissipation in a resistance. What is Joule’s law?
• What is the difference between D.C and A.C?
• Discuss the main features of parallel combinations of resistors.
• Determine the equivalent resistance of a series combination of resistors.
• Describe briefly the hazards of household electricity.
• Describe four safety measures that should be taken concerning the household circuit.

### Conclusion

The topic of this post is 10th Class Physics Chapter 14 Notes Short Questions without any PDF file. We add this post to the 10th Class Physics Notes category where students can easily find the Chapter 5 Short Questions type study solutions and much more that students need to be related to the Class 10 Physics Book.