The Electric Field (or Electric Field Intensity) at a point is defined as the electrostatic force experienced by a unit positive test charge placed at that point.
Formula: Electric Field = Force / Charge.
Dimensional Formula: [M L T⁻³ A⁻¹].
Dimension of Charge: [A T].
SI Unit: N/C or V/m.
Step 1: The formula for Electric Field (E) is: E = Force / Charge (E = F / q)
Step 2: Find the dimension of Force and Charge:
Step 3: Substitute them into the formula: E = [M L T⁻²] / [A T] E = [M L T⁻² · A⁻¹ T⁻¹]
Final Dimensional Formula: [M L T⁻³ A⁻¹]
The dimensional formula of an electric field is [M L T⁻³ A⁻¹].
Electric charge is Current × Time, so its dimension is [A T].
Hydraulic Brakes — Principle, Working and Pascal's Law
Hydraulic brakes work on Pascal's Law — pressure applied at one point is transmitted equally throughout. Small force on pedal → large braking force. Full explanation.
How Does an Incandescent Lamp (Light Bulb) Work?
Learn the physics behind the classic incandescent lamp (light bulb). Understand how the Tungsten filament works, the role of Argon gas, and its energy efficiency.
Difference Between Interference and Diffraction
Learn the primary differences between interference (superposition of waves from two coherent sources) and diffraction (bending of waves around corners).
Internal Combustion Engine — Working, Types and Efficiency
An IC engine converts chemical energy of fuel into mechanical energy via combustion inside a cylinder. Types: 2-stroke, 4-stroke. Efficiency 25-40%. Fully explained.
Inverting and Non-Inverting Amplifiers (Op-Amps)
Learn the difference between an Inverting and a Non-Inverting Amplifier in electronics. Understand operational amplifiers (Op-Amps) phase shifts and gain formulas.
Turn this guide into revision flashcards, a practice exam, or an AI-generated podcast — free, no signup required.