Which of the following rules helps us to detect the direction of angular velocity?
Correct answer: D. Right hand rule
- A. Head to tail rule
- B. Kirchhoff rule
- C. Left hand rule
- D. Right hand rule
Explanation
The right-hand rule is another mnemonic used to determine the relationships between current, magnetic fields, and induced currents. For a current-carrying wire, you would point your right thumb in the direction of the current flow, while curling your fingers around the wire. The direction in which your fingers curl indicates the direction of the magnetic field lines encircling the wire. In the context of electromagnetic induction, if you point your right thumb in the direction of the induced current and your fingers in the direction of the magnetic field, your palm will indicate the direction of the force acting on the conductor. This rule is critical for understanding phenomena in electromagnetism, including the functioning of motors and generators.
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About Angular Velocity
Angular velocity describes how quickly angular displacement changes with time, with ω = Δθ/Δt and units of radians per second. Questions relate angular and linear motion through v = rω, use the direction given by the right hand rule, and distinguish angular velocity from angular acceleration and ordinary frequency.
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