Each wire in a UK three-pin plug serves a specific safety and functional purpose - Live (brown) carries the current in, Neutral (blue) completes the circuit, and Earth (green/yellow) provides emergency protection. Step-by-Step Solution: Live wire (brown) - Carries 230V alternating current from the mains supply to th
Reflection and refraction are behaviors of light waves where light either bounces off surfaces (reflection) or changes direction when passing through different mediums (refraction). Step-by-Step Solution: Reflection: Draw incident ray, normal line (90° to surface), and reflected ray. Angle of incidence (i) = angle o
A charged comb attracts neutral paper through electrostatic induction, where the charge on the comb causes temporary charge separation in the paper. Step-by-Step Solution: When the negatively charged comb approaches, it repels electrons in the paper This creates a temporary positive charge on the near side of the p
The current flowing through the 10Ω resistor is 2 amperes (A). Step-by-Step Solution: Recall Ohm's Law: V = IR (where V=voltage, I=current, R=resistance) Rearrange formula to find current: I = V/R Insert values: I = 20V ÷ 10Ω Calculate: I = 2A Verify units match: volts/ohms = amperes ✓ Key Mistake to Avoid: Don
Momentum is the product of mass and velocity (p = mv), measured in kg⋅m/s. In any collision, the total momentum before equals the total momentum after, as long as no external forces act on the system. Step-by-Step Solution: Calculate momentum using p = mv (mass × velocity) For collisions: p₁(before) + p₂(before) =
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