JAMB Exam  >  JAMB Notes  >  Physics for JAMB  >  Quick Revision: Current Electricity

Quick Revision: Current Electricity | Physics for JAMB PDF Download

Download, print and study this document offline
261 videos|249 docs|232 tests

Top Courses for JAMB

FAQs on Quick Revision: Current Electricity - Physics for JAMB

1. What is current electricity?
Ans. Current electricity refers to the flow of electric charge in a conducting medium, such as a wire. It is the movement of electrons through a closed circuit, resulting in the production of electrical energy.
2. What is the difference between AC and DC current?
Ans. AC (alternating current) and DC (direct current) are two types of current electricity. AC current periodically changes direction, while DC current flows in only one direction. AC current is commonly used in household electricity, while DC current is used in batteries and electronic devices.
3. How is current measured?
Ans. Current is measured using a device called an ammeter. It is connected in series with the circuit and measures the flow of electric charge by detecting the number of electrons passing through a specific point in the circuit per unit time. The unit of current is ampere (A).
4. What is resistance?
Ans. Resistance is a property of a material that opposes the flow of electric current. It is determined by the material's composition, dimensions, and temperature. The unit of resistance is ohm (Ω). Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied and inversely proportional to the resistance.
5. How does an electric circuit work?
Ans. An electric circuit is a closed loop through which electric current can flow. It consists of a power source (such as a battery), conductive wires, and various components (such as resistors, capacitors, and switches). When a voltage is applied across the circuit, the electrons start to flow, creating a current. The circuit components control the flow of current and allow the desired electrical operation to occur.
261 videos|249 docs|232 tests
Download as PDF
Explore Courses for JAMB exam

Top Courses for JAMB

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

Summary

,

Important questions

,

Viva Questions

,

Semester Notes

,

Free

,

Sample Paper

,

MCQs

,

ppt

,

Quick Revision: Current Electricity | Physics for JAMB

,

pdf

,

study material

,

Exam

,

Quick Revision: Current Electricity | Physics for JAMB

,

past year papers

,

mock tests for examination

,

shortcuts and tricks

,

Extra Questions

,

Quick Revision: Current Electricity | Physics for JAMB

,

video lectures

,

Previous Year Questions with Solutions

,

Objective type Questions

,

practice quizzes

;