Assertion Reason Physics Chapter 3 Current Electricity
Questions of Assertion Reason of Physics Chapter 3 Current Electricity CBSE Class 12 are very simple to understand as this chapter deals with Current Electricity To solve assertion reason type questions of Physics, a deeper understanding of concept about Electric Current, Ohm’s law and its limitations, Drift of Electrons and the Origin of Resistivity, Resistivity of Various Materials, Temperature Dependence of Resistivity, Electrical Energy, Power, Cells, emf, Internal Resistance, Cells in Series and in Parallel, Kirchhoff’s Rules and Wheatstone Bridge is required. In order to help the student in solving Assertion Reason type of questions, detailed process is explained.
How to solve Assertion Reason Type Questions?
In Assertion-Reason type of question, two statements are given, first is Assertion and second is called Reason. Student must have to think critically about both the statements in Assertion Reason Questions, since it combines multiple choice questions and true/false type of questions which requires a higher level of understanding.
How many types are there of Assertion Reason Type Questions?
Assertion-Reason type of questions can be asked either with four MCQ options or with five MCQ options. First four options are same in both the cases only one more options is being provided i.e. last one. One extra option increases the difficulty level of the questions.
In assertion reason type of questions, all 4 or 5 options are same for each question, which are as:
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
(e) Both Assertion and Reason are false.
Then a question haunts in every student’s mind, which option is correct and when?
This can be understood clearly with the following table:
| Assertion (A) | Reason (R) | MCQ Options (Fixed for all questions) |
|---|---|---|
| If True | True | (a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). |
| If True | True | (b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). |
| If True | False | (c) Assertion (A) is true but reason (R) is false. |
| If False | True | (d) Assertion (A) is false but reason (R) is true. |
| If False | False | (e) Both Assertion and Reason are false. |
Now, lets practice some Assertion Reason Questions of Physics: Chapter 3 Current Electricity
Read instructions carefully before answering the questions.
For question given below, two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
(a) Both A and R are true and R is correct explanation of the assertion.
(b) Both A and R are true but R is not the correct explanation of the assertion.
(c) A is true but R is false.
(d) A is false but R is true.
Question.1.
Assertion: In a simple battery circuit, the point of the lowest potential is positive terminal of the battery.
Reason: The current flows towards the point of the higher potential, as it does in such a circuit from the negative to the positive terminal.
Ans.1. (d)
A is false but R is true.
Question.2.
Assertion: A larger dry cell has higher emf.
Reason: The emf of a dry cell is proportional to its size.
Ans.2. (d)
A is false but R is true.
Question.3.
Assertion: A current continues to flow in superconducting coil even after switch is off.
Reason: Superconducting coils show Meissner effect.
Ans.3. (b)
Both A and R are true but R is not the correct explanation of the assertion.
Question.4.
Assertion: Voltmeter is connected in parallel with the circuit.
Reason: Resistance of a voltmeter is very large.
Ans.4. : (b)
Both A and R are true but R is not the correct explanation of the assertion.
Question.5.
Assertion: Ohm’s law is applicable for all conducting elements.
Reason: Ohm’s law is a fundamental law.
Ans.5. (c)
A is true but R is false.
Question.6.
Assertion: An electric bulb becomes dim, when the electric heater in parallel circuit is switched on.
Reason: Dimness decreases after sometime.
Ans.6. (b)
Both A and R are true but R is not the correct explanation of the assertion.