Q. What is the effect of increasing the number of turns in a coil on the magnetic field strength produced by it? (2022)
A.
Increases the field strength
B.
Decreases the field strength
C.
No effect
D.
Reverses the field direction
Solution
Increasing the number of turns in a coil increases the magnetic field strength produced by it, as the field strength is directly proportional to the number of turns.
Q. What is the force experienced by a current-carrying conductor of length L in a magnetic field B at an angle θ? (2023)
A.
F = BIL
B.
F = BIL sin(θ)
C.
F = BIL cos(θ)
D.
F = BIL²
Solution
The force on a current-carrying conductor in a magnetic field is given by F = BIL sin(θ), where θ is the angle between the conductor and the magnetic field.
Q. What is the force on a charge moving in a magnetic field given by F = qvB sin(θ)? (2022)
A.
It is always zero
B.
It depends on the angle θ
C.
It is constant
D.
It is maximum when θ = 90°
Solution
The force on a charge moving in a magnetic field is maximum when the angle θ between the velocity vector and the magnetic field is 90°, as sin(90°) = 1.
Q. What is the force on a charge moving in a magnetic field given by the equation F = qvB sin(θ)? (2020)
A.
Charge times velocity
B.
Charge times magnetic field
C.
Charge times velocity times magnetic field times sine of angle
D.
Charge times sine of angle
Solution
The force on a charge moving in a magnetic field is given by F = qvB sin(θ), where q is the charge, v is the velocity, B is the magnetic field strength, and θ is the angle between the velocity and the magnetic field.
Correct Answer:
C
— Charge times velocity times magnetic field times sine of angle
Magnetism is a crucial topic in physics that plays a significant role in various school and competitive exams. Understanding magnetism not only helps in grasping fundamental concepts but also enhances your problem-solving skills. Practicing MCQs and objective questions on magnetism is essential for effective exam preparation, as it allows you to identify important questions and reinforce your knowledge through practice questions.
What You Will Practise Here
Fundamental concepts of magnetism and magnetic fields
Types of magnets and their properties
Magnetic force and its applications
Electromagnetism and its significance
Key formulas related to magnetic fields and forces
Magnetic field lines and their representation
Real-life applications of magnetism in technology
Exam Relevance
Magnetism is a vital topic in various educational boards, including CBSE and State Boards, as well as competitive exams like NEET and JEE. Questions on magnetism often appear in multiple-choice format, testing students on definitions, concepts, and problem-solving abilities. Familiarity with common question patterns, such as those involving calculations of magnetic forces and field strengths, can significantly enhance your performance in these exams.
Common Mistakes Students Make
Confusing the direction of magnetic field lines and forces
Misunderstanding the distinction between permanent and temporary magnets
Overlooking the significance of the right-hand rule in electromagnetism
Neglecting to apply formulas correctly in numerical problems
FAQs
Question: What are the key properties of magnets? Answer: Magnets have two poles (north and south), attract certain metals, and can create magnetic fields.
Question: How does electromagnetism differ from permanent magnetism? Answer: Electromagnetism is generated by electric currents, while permanent magnetism is inherent to certain materials.
Now is the time to enhance your understanding of magnetism! Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your exams. Remember, consistent practice is the key to success!
Soulshift Feedback×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy?
