Magnetic Force

Q1: A positive change moving with a constant velocity v enters a region of a uniform magnetic field pointing out the page. What is the direction of the magnetic force on the charge?

مستقل رفتار کے ساتھ چلنے والی ایک مثبت تبدیلی صفحہ کی نشاندہی کرنے والے یکساں مقناطیسی فیلڈ کے ایک خطے میں داخل ہوتی ہے۔ چارج پر مقناطیسی قوت کی سمت کیا ہے؟

A. Right
B. To the bottom of the page
C. None of these
D. To the top of the page

Explanation

The magnetic force on a moving charge is given by Lorentz force: $F = q (v \times B)$

Using the right-hand rule, point your fingers in the direction of velocity (v), curl them toward the magnetic field (out of the page), and your thumb points in the direction of force.

For a positive charge, the force is toward the top of the page.

Q2: Which of the following best describes magnetic force?

A. Restoring force
B. Reflecting force
C. Gravitational force
D. Deflecting force

Q3: If the conductor carrying current experiences a magnetic force at an angle of 90 degrees, and then the angle decreases to 60 degrees, what will happen to the force?

اگر کرنٹ لے جانے والا موصل 90 ڈگری کے زاویہ پر مقناطیسی قوت کا تجربہ کرتا ہے، اور پھر زاویہ 60 ڈگری تک گھٹ جاتا ہے، تو اس قوت کا کیا ہوگا؟

A. Increase
B. Become zero
C. Decrease
D. Remain constant

Magnetic Force | MCQs

Q1: A positive change moving with a constant velocity v enters a region of a uniform magnetic field pointing out the page. What is the direction of the magnetic force on the charge?

Explanation

Q2: Which of the following best describes magnetic force?

Explanation

Q3: If the conductor carrying current experiences a magnetic force at an angle of 90 degrees, and then the angle decreases to 60 degrees, what will happen to the force?

Explanation

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