Question 161 markMCQSection A

$The resultant magnetic field at point 'P' situated midway between two parallel wires (placed horizontally) each carrying a steady current I is$

Magnetic Effects of Electric Current

Magnetic Field

Options

(a)

in the same direction as the current in the wires.

(b)

in the vertically upward direction.

(c)

zero

(d)

in the vertically downward direction.

Official answer

The resultant magnetic field at point 'P' situated midway between two parallel wires (placed horizontally) each carrying a steady current I is zero.

magnetic field

current-carrying straight conductor

right-hand thumb rule

Marking scheme

1. $1 mark for correct answer$
2. $0 marks for incorrect answer$

Hint

$Use the right-hand thumb rule to determine the direction of the magnetic field due to a current-carrying straight conductor.$

Quick oral answer

$The resultant magnetic field at point 'P' situated midway between two parallel wires (placed horizontally) each carrying a steady current I is zero because the magnetic fields produced by the two wires at point 'P' are in opposite directions, resulting in a net magnetic field of zero.$

Common mistakes

1. $assuming that the magnetic fields produced by the two wires are in the same direction$
2. $not considering the direction of the current in the wires$

Analysis and explanation

The question requires the application of the right-hand thumb rule to determine the direction of the magnetic field due to a current-carrying straight conductor. The correct answer is zero because the magnetic fields produced by the two wires at point 'P' are in opposite directions, resulting in a net magnetic field of zero.

Interesting facts

$The magnetic field due to a current-carrying straight conductor is perpendicular to the direction of the current.$

$The magnetic field lines form concentric circles around the conductor.$

Question details

Q16 of 39 questions

Board: CBSE
Class: Class 10
Subject: Science
Year: 2023
Section: Section A
Marks: 1
Type: MCQ
Chapter: Magnetic Effects of Electric Current
Topic: $Magnetic Field$
Bloom's level: Comprehension
Syllabus topic: $Magnetic Field due to a Current through a Straight Conductor$

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Frequently asked questions

$How many marks does this question carry in CBSE Class 10 Science 2023?$

$This question carries 1 mark in the CBSE Class 10 Science 2023 examination.$

$Which chapter does this question come from in Science?$

$This question is from the chapter "Magnetic Effects of Electric Current" in the CBSE Class 10 Science syllabus.$

$What topic does this question cover in Science?$

$This question covers the topic "Magnetic Field" from CBSE Class 10 Science.$

$What type of question is this in the CBSE Class 10 Science 2023 paper?$

$This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.$