The length L (in centimetre) of a copper rod is a linear function of its Celsius temperature C. In an experiment, if L= 124.942 when C = 20 and L= 125.134 when C = 110, express L in terms of C.

The length L (in centimetres) of a copper rod is a linear function of its Celsius temperature C. In an experiment, if L = 124.942 when C = 20 and L = 125.134 when C = 110, express L in terms of C.

The function ‘t', which maps temperature in Celsius into temperature in Fahrenheit is defined by t(c)= (9c)/5+32 . Find : the value of c when t(c) = 210.

The function 't' which maps temperature in degree Celsius into temperature in degree Fahrenheit is defined by t(C)=(9C)/5+32 .Find:- The value of C, when t(C) = 212.

Derive the expression for the impedance of an a.c. circuit with an inductor L and a resistor R in series.

Define impedance of an electric circuit. How it differs from ohmic resistance ? Find an expression for the impedance of an a.c. circuit containing L-C-R in series.

An inductor L of inductance X_L is connected in series with a bulb B and an source. How would brightness of the bulb change when the number of turns of the inductor is reduced an iron rod is inserted in the inductor and a capacitor of reactance X_C=X_L is inserted in series in the circuit. Justify your answer in each case.

Two cocentric circle common centre O. A line 'l' intersects these circle A,B,C and D. Prove that AB = CD.

A thin rod having length L_0 at 0^@C and coefficient of lineare expansion alpha has its two ends maintained at temperatures theta_1 and theta_2 , respectivley. Find its new length.