
- A$100$
- B$20$
- C$14$
- ✓$1$

${v}^{2}=\frac{20}{10} {x}+20$
${v}^{2}=2 {x}+20$
$2 {v} \frac{{d} {v}}{{d} {x}}=2$
$\therefore {a}={v} \frac{{d} {v}}{{d} {x}}=1$
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$(i)$ The pressure of a gas is proportional to the mean speed of the molecules.
$(ii)$ The root mean square speed of the molecules is proportional to the pressure.
$(iii)$ The rate of diffusion is proportional to the mean speed of the molecules.
$(iv)$ The mean translational kinetic energy of a gas is proportional to its kelvin temperature.
Assertion $A:$ Alloys such as constantan and manganin are used in making standard resistance coils.
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