Light - Reflection and Refraction
State the mirror formula used for spherical mirrors.
The mirror formula is 1/f = 1/v + 1/u, where f is focal length, v is image distance, and u is object distance.
Practice original NCERT-style Class 10th physics examples across light, electricity, motion, and magnetic effects with short answers.
These are original chapter-wise practice questions inspired by Class 12th NCERT-style learning goals, not copied textbook examples.
State the mirror formula used for spherical mirrors.
The mirror formula is 1/f = 1/v + 1/u, where f is focal length, v is image distance, and u is object distance.
Why does the sky appear blue during the day?
The sky appears blue because shorter wavelengths of light are scattered more by the atmosphere.
A bulb uses 2 A current when connected to a 6 V battery. Find its resistance.
Using Ohm's law, R = V / I = 6 / 2 = 3 ohm.
What happens to the direction of force on a current-carrying conductor if the direction of current is reversed?
The direction of force also reverses.
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