Stories and questions with this tag.
Okay drama alert 🎭 this chapter has betrayed me. Capacitors, combinations and energy. Setup from a question I did: a 2\ \mu\text{F} capacitor is charged to 100 V and then connected positive plate to positive plate to an
I have been revising Thermodynamics, and the Zeroth law of thermodynamics looks too obvious to be called a law. NCERT states it as: two systems in thermal equilibrium with a third system separately are in thermal equilib
I'm colour-coding the Mechanical Properties of Solids chapter and I hit a statement I can't reconcile: "steel is more elastic than rubber". But rubber stretches a lot and comes back, while steel hardly stretches at all.
Amma says I should explain things to myself out loud, so here goes, and then you tell me where I'm wrong. A moving coil galvanometer has resistance G = 100\ \Omega and full-scale deflection current I g = 5 mA. To make a
Sorry for posting at 1 am, can't sleep and this chapter is stuck in my head. NCERT says de Broglie's hypothesis explains Bohr's second postulate. I followed the algebra: if the orbit is a standing wave then 2\pi r n = n\
Modern physics has a small formula set and many conceptual questions. Here is how to turn it into reliable marks.
Magnitudes come out right but the direction of the induced current does not. A reliable method for Lenz's law and the other direction rules.
I lost three marks on a "which reaches the bottom first" question, then spent a weekend with a plank and four tins. This is the whole idea in one place.
I read Huygens' principle: every point on a wavefront is a source of secondary spherical wavelets, and the new wavefront is the forward envelope of them. NCERT then derives Snell's law for a plane wavefront AB hitting a
So our school lab test has the NCERT activity: 'identify a diode, an LED, a resistor and a capacitor from a mixed collection'. I'm the notes queen but I've never actually held most of these, so I made a table of what I e
Two small things from the measurement section that keep tripping me in my colour-coded notes I have a whole pink page for "zero error" and it still isn't clear . 1. Vernier calipers. Main scale smallest division is 1 mm
NCERT says a choke coil is used to reduce current in an AC circuit with almost no power loss , while a resistor would waste it as heat. I do NOT get this. Current drops in both cases! For a series L–R circuit, I {rms} =
