Coefficient of volumetric expansion `(lambda)` is basically independent of change in pressure . Is the statement true?

When the number of magnetic field lines through a closed loop changes ,an induced current flows in the coil. Is this statement true.

The magnitude of induced emf produced depends on the rate of change of magnetic flux through the coil. is this statement true.

The coefficient of volume expansion of glycerine is 49 xx 10^-5 ^@C^-1 . What is the fractional change in its density for 30^@C rise in temperature?

The coefficient of cubical expansion of mercury is 0.00018 and that of brass 0.00006 per deg C. If a barometer having a brass-scale were to read 74.5 cm at 30^@C , find the true barometric height at 0^@C . The scale is supposed to be correct at 15^@C .

When the current changes the direction 50 times in one second then the frequency of a.c. is 50 Hz. is this statement true.

From rated value of power and potential difference the resistance of the appliance can be found by the formula R=(V_(rated)^2)/(P_(rated)) . This resistance does not change if the same appliance is used across different potential difference. But the power of appliance will change. Is this statement true.

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Entry of water from soil into xylem takes place through gradient of suction pressure. Reason:Water moves from a place of higher suction pressure to a place of lower suction pressure.

Wiens Law (lambda_(m)) corresponding to which energy emitted per sec per unit area by a perfectly black body (surface) is maximum is inversly proportional to the absolute temp (T) of the black body . lambda_(m)prop(1)/(T)orlambda_(m)=(b)/(T) Where b is a constant of proportionality and is called Wein's constant b=2.898xx10^(-3)mK . Is the statement True?

Statement-I : In the expansion of (1+ x)^n ifcoefficient of 31^(st) and 32^(nd) terms are equal then n = 61 Statement -II : Middle term in the expansion of (1+x)^n has greatest coefficient.