“12th Class Physics Chapter 13 Quiz: Current Electricity” pertains to the study of electric currents, together with the connected ideas of potential difference and resistance. It explains how to measure ohms, the law of ohm, various factors affecting current, potential divider, resistance combining, series vs. parallel arrangement, the solution of current when the internal resistances are to be ignored in the meters as well as solving problems dealing with combinations. This chapter forms a base, without which mastering advanced physics might not be achievable for MDCAT students.
Overview of Current Electricity
In this chapter on current electricity, the flow of the electric charge due to the application of potential differences is discussed. Thus, the student learns that it is the rate of flow of electric charge, and the current electricity goes from positive to negative, the opposite of electron flow. Moreover, the chapter deals with voltage, current, and resistance and their units. The concepts are interlinked by Ohm’s Law. According to it, the current is directly proportional to the applied voltage and inversely proportional to the resistance for a circuit in question.
Resistance and Resistivity
A large part of the chapter discusses resistance and the factors that influence it. The student will learn how the resistance of a conductor depends on its material, length, and cross-sectional area. It also introduces the concept of resistivity, a physical property of materials quantifying their opposition to current flow. Comparing materials on the basis of resistivity, it turns out that conductors have low resistivity while insulators have high resistivity. Students will equally learn about the behavior of resistors when connected in series and parallel circuits and how to find the total resistance in such combinations.
Electrical Power and Energy
The chapter further discusses electrical power and how to find the amount of energy a device uses, be it electrical. It tells us that, by definition, power is the rate at which electrical energy is transferred to other forms, like heat or light, and is given by the product of voltage and current. The formula for electrical power is deduced, and students will be able to calculate energy consumption based on the relationship between power and time. Several practical examples have been added so as to bring out the importance of electrical power in real life.
MDCAT Quiz: Test Your Knowledge of Current Electricity
Our MDCAT Quiz for Chapter 13 focuses on such topics as Ohm’s Law, resistance, resistivity, electrical power, and energy consumption. The quiz will help you reinforce the key equations and concepts involved in current electricity, ensuring you are fully prepared for MDCAT exam questions on this chapter.
- Test Name: 12th Class Physics Chapter 13 Quiz
- Type: Quiz Test
- Total Questions: 30
- Total Marks: 30
- Time: 30 minutes
Note: Answer of the questions will change randomly each time you start the test, once you are finished, click the View Results button.
Get Your Username and Password for MDCAT Tests
Sign Up Now
Free Flashcards for Current Electricity
Use free flashcards for Chapter 13, for quick revision. The flashcards cover important topics such as Ohm’s Law, electrical resistance, resistivity, and power calculations. Flashcards are a good way of revising crucial formulas and concepts, which will make it easier to recall them during your MDCAT preparation.
What is the potential difference required to produce a current of one ampere in a circuit with a resistance of one ohm?
Volt
What is the measure of how difficult it is for current to flow through a material called?
Resistance
Which law describes the relationship between voltage, current, and resistance in an electrical circuit?
Ohm's law
What is the potential difference required to produce a current of one ampere in a conductor with a resistance of one ohm?
Volt
Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points?
Ohm's law
What is the opposition to the flow of alternating current caused by inductance or capacitance?
Reactance
What is the potential difference required to produce a current of one ampere in a circuit with a resistance of one ohm?
Volt
What is the measure of how difficult it is for current to flow through a material called?
Resistance
Experience the real exam environment with our expertly designed collection of over 25,000 MCQs MDCAT Mock Tests.
