Question

plz hlp me clearly step-by-step plzzz

given data
t1=10°c
t2=100°c
R1=1ohm
R2=7
Alpha=?​​

Answer 1

Step-by-step explanation:

Initial temperature = 10°C

Final temperature = 100°C

Initial resistance = 1Ω

Final temperature = 7Ω

To Find :

Coefficient of linear expansion.

Solution :

❖ Coefficient of linear expansion.

Coefficient of linear expansion.

α = R−Ro/Ro ×ΔT

By substituting the given values;

: ⟹ α = 7 - 1 / 1*(100-10)

: ⟹ α = 6/90

$\alpha = 0.067 {}^{0} c {}^{ - 1}$

Knowledge Booster :-

• The three coefficients of expansion α, β and \gammaγ are not constant for a given solid. Their values depend on the temperature range.
• For most of the solids, the value of α lies between 10‾⁶ to 10‾⁵ K‾¹ in the temperature range of 0 to 100°C.
• The value of α is more for ionic solids than that for non-ionic solids.
• The coefficient of volume expansion of solids and liquids is rather small, particularly very small for pyrex glass and invar.