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 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 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.

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

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.

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.

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.

The dimensions of magnetic field intensity in M,L,T and c(coulomb) is given as

A metal rod A of 25 cm length expands by 0.050 cm when its temprature is raised frmo 0^@C to 100^@C . Another rod B of a different metal of length 40 cm expands by 0.040 cm for the same rise in temperature. A third rod C of 50 cm length is made up of pieces of rods A and B placed end to end expands by 0.03 cm on heating from 0^@C to 50^@C . Find the lengths of each portion of the composite rod C.