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Questions and Answers
What is the dimension of velocity?
What is the dimension of velocity?
A proton is placed in a uniform electric field of intensity 10 N/C towards east. What will be the direction of force on the proton?
A proton is placed in a uniform electric field of intensity 10 N/C towards east. What will be the direction of force on the proton?
A body starts from rest and moves with an acceleration of 2 m/s². If it travels a distance of 18 meters, what is its final velocity?
A body starts from rest and moves with an acceleration of 2 m/s². If it travels a distance of 18 meters, what is its final velocity?
A point charge q is placed at a distance r from an electric dipole. If the electric field at the point is E, what is the direction of the electric field?
A point charge q is placed at a distance r from an electric dipole. If the electric field at the point is E, what is the direction of the electric field?
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A particle moves with a velocity of 4 m/s towards east. It is suddenly struck by a force of 2 N towards west. What is the resulting acceleration of the particle?
A particle moves with a velocity of 4 m/s towards east. It is suddenly struck by a force of 2 N towards west. What is the resulting acceleration of the particle?
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Study Notes
Kinematics 1D
- Displacement: Minimum distance between initial and final position of an object, can be positive, negative, or zero.
- Distance: Total path length covered by an object, always positive.
- Speed: Rate of change of distance, scalar quantity, units: m/s.
- Velocity: Rate of change of displacement, vector quantity, units: m/s.
- Acceleration: Rate of change of velocity, vector quantity, units: m/s².
- Motion in a straight line: Can be uniform or non-uniform, described by equations of motion.
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Equations of motion:
- v = u + at
- s = ut + (1/2)at²
- v² = u² + 2as
- where u: initial velocity, v: final velocity, a: acceleration, t: time, s: displacement
Electric Fields and Charges
- Coulomb's Law: Force between two point charges, proportional to product of charges and inversely proportional to square of distance between them.
- Electric Field: Force per unit charge, units: N/C.
- Electric field lines: Imaginary lines that emerge from positive charge and enter into negative charge, never intersect.
- Electric field intensity: Force experienced by a unit positive charge, units: N/C.
- Electric flux: Product of electric field intensity and area, units: Nm²/C.
- Gauss's Law: Total electric flux linked with a closed surface is proportional to charge enclosed within the surface.
- Types of charges: Like charges (repel), unlike charges (attract), neutral (no force).
- Conductors and insulators: Conductors allow free movement of charges, insulators do not.
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Description
Quiz on kinematics in one dimension and electric fields, including dimension of velocity, forces on charges, and electric dipoles, as per JEE Mains syllabus.
