sci_phy
Electric Circuits
Chapter summary, hard words and model exam answers for ICSE Class 10 Hindi.
Free online summary and notes (ICSE Class 10 Hindi). Read it here, no PDF download needed.
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Physics · CBSE 10 · ICSE 10 · GCSE (AQA, Edexcel, OCR)
Summary
Current is measured in amperes, voltage in volts. The cell gives each unit of charge energy to travel round the loop.
It rises with longer, thinner wires and with temperature. Insulators have very high resistance.
Total resistance R = R1 + R2 + ... If one part breaks, the whole circuit stops.
Adding branches lowers total resistance (1/R = 1/R1 + 1/R2). Homes are wired this way so devices work independently.
Hard words & meanings
| electric current (I) | the rate of flow of charge, I = Q/t, measured in amperes |
| charge (Q) | a basic property of matter, measured in coulombs |
| potential difference (V) | energy transferred per unit charge, measured in volts; also called voltage |
| resistance (R) | the opposition to current, measured in ohms; V = IR |
| series circuit | components in a single loop, so the same current flows through all |
| parallel circuit | components on separate branches, each across the full supply voltage |
| ammeter | a meter that measures current, connected in series |
| voltmeter | a meter that measures voltage, connected in parallel across a component |
Model exam answers, grammar & audio
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