Discussion
Read the following statements and choose the correct option :
Assertion (A) : Electric current is a vector quantity.
Reason (R) : Electric current is a quantity having magnitude as well as direction.
Answer: C
The key's answer is (A) is false, but (R) is true.
Electric current has a magnitude and is assigned a direction (the direction of flow of positive charge), which is what the Reason says. But it is a scalar, because currents do not combine by the laws of vector addition: the currents meeting at a junction simply add arithmetically (Kirchhoff's junction rule), whatever the angles between the wires.
So the Assertion that current is a vector is false. Having a direction is necessary for a vector quantity but not sufficient, which is why options treating both statements as true are wrong.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development