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Test: Magnetic Force - Class 10 MCQ


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10 Questions MCQ Test Science Class 10 - Test: Magnetic Force

Test: Magnetic Force for Class 10 2024 is part of Science Class 10 preparation. The Test: Magnetic Force questions and answers have been prepared according to the Class 10 exam syllabus.The Test: Magnetic Force MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Magnetic Force below.
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Test: Magnetic Force - Question 1

When the direction of current through the conductor is reversed, the direction of

Detailed Solution for Test: Magnetic Force - Question 1
Stretch out your hand as per Fleming left-hand rule and then tilt your hand upside down. You can see that the direction of mag field is the same, but the direction of current has reversed as per the question. also, the thumb goes downwards i.e opposite to initial direction. hence, we can see that the direction of force has been reversed.
Test: Magnetic Force - Question 2

What does an electric current flowing through a conductor produce?

Detailed Solution for Test: Magnetic Force - Question 2

An electric current flowing through a conductor produces a magnetic field, as stated by the interaction of moving charges. This phenomenon is fundamental to electromagnetism and finds applications in various technologies like electric motors and generators.

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Test: Magnetic Force - Question 3

The magnetic field inside a long straight solenoid carrying current _____.

Detailed Solution for Test: Magnetic Force - Question 3

The magnetic field inside a long straight solenoid carrying current is the same at all points. This characteristic is a key property of the magnetic field produced by such a configuration.

Test: Magnetic Force - Question 4

What rule can be used to determine the direction of the force on a current-carrying conductor in a magnetic field?

Detailed Solution for Test: Magnetic Force - Question 4
  • Fleming's left-hand rule is used to determine the direction of the force on a current-carrying conductor in a magnetic field.
  • By aligning the thumb, forefinger, and middle finger of the left hand in specific directions, one can easily determine the resultant force acting on the conductor.
  • This rule is a fundamental concept in understanding the interaction between magnetic fields and current-carrying conductors.
Test: Magnetic Force - Question 5

A current-carrying rod experiences a force perpendicular to its length and the ______ field.

Detailed Solution for Test: Magnetic Force - Question 5

A current-carrying rod experiences a force perpendicular to its length and the magnetic field, as described by the interaction between current and magnetic fields in electromagnetism.

Test: Magnetic Force - Question 6

Assertion (A): The direction of force on a current-carrying conductor placed in a magnetic field depends on the direction of both the current and the magnetic field.

Reason (R): When the direction of the current through the conductor is perpendicular to the direction of the magnetic field, the force experienced by the conductor is at its maximum.

Detailed Solution for Test: Magnetic Force - Question 6
  • The assertion that the force on a current-carrying conductor in a magnetic field depends on the directions of both the current and the magnetic field is correct. This relationship is described by the right-hand rule for the force on a current-carrying conductor in a magnetic field.
  • The reason that the force is maximum when the current is perpendicular to the magnetic field is also correct. This is a fundamental principle of electromagnetism.
  • However, the reason does not directly explain why the assertion is true. While it is true that the force is maximum when the current is perpendicular to the magnetic field, this fact alone does not fully explain the dependence of the force on the directions of both the current and the magnetic field. Hence, Option B is the correct answer.
Test: Magnetic Force - Question 7
Which of the following statements is true about the magnetic field inside a long, straight solenoid carrying current?
Detailed Solution for Test: Magnetic Force - Question 7
Inside a long, straight solenoid carrying current, the magnetic field is uniform and parallel to the axis of the solenoid. This uniformity is due to the fact that the magnetic field lines are parallel and closely spaced inside the solenoid.
Test: Magnetic Force - Question 8
What happens to the direction of the force on a current-carrying conductor when the direction of the current is reversed, while the magnetic field remains unchanged?
Detailed Solution for Test: Magnetic Force - Question 8
According to Fleming's left-hand rule, if the direction of the current is reversed while keeping the magnetic field unchanged, the direction of the force on the conductor is also reversed.
Test: Magnetic Force - Question 9
What is the purpose of Fleming’s left-hand rule in electromagnetism?
Detailed Solution for Test: Magnetic Force - Question 9
Fleming’s left-hand rule is used to determine the direction of the force experienced by a current-carrying conductor in a magnetic field. The thumb, forefinger, and middle finger of the left hand represent the direction of the force, the magnetic field, and the current, respectively.
Test: Magnetic Force - Question 10

If a current-carrying conductor is placed in a uniform magnetic field and oriented parallel to the magnetic field lines, what happens to the force on the conductor?

Detailed Solution for Test: Magnetic Force - Question 10

When a current-carrying conductor is oriented parallel to the magnetic field lines, the force experienced by the conductor is zero. This is because the force on the conductor is given by F=BILsin⁡θ, where θ is the angle between the direction of the current and the magnetic field. When θ is 0 degrees (parallel), sin⁡θ is zero, resulting in no force.

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