Units and Measu...

Light year is a unit of

Which of the following is not represented in correct unit?

One nanometre is equal to

In S = a + bt + \(ct^2\). S is measured in metres and t in seconds. The unit of c is

Volt/metre is the unit of

\(\frac{Erg}{m^{-1}}\) can be the unit of measure for

What is the SI unit of permeability?

1 kWh =

Which of the following is smallest unit?

Liquids and gases which have ability to flow are called.............

The pair(s) of physical quantities that have the same dimensions, is (are)

If 97.52 are divided by 2.54, the correct result in terms of significant figures is

Wavelength of ray of light is 0.00006m. It is equal to

One Mach number is equal to

If the acceleration due to gravity is 10\( ms^{-2}\) and the units of length and time are changed in kilometer and hour respectively, the numerical value of the acceleration is

The frequency of vibration of string is given by equation given below. Here p is number of segments in the string and l is the length. The dimensional formula for m will be

v = \(\frac{p}{2l} \Big[ \frac{F}{m} \Big ]^{\frac{1}{2}}\)

The best method to reduce random error is

The mass of a body is 20.000 g and its volume is 10.00 \(cm^3\). If the measured values are expressed to the correct significant figures, find the maximum error in the value of density in (\(gcm^{-3}\)).

Assertion: Light year and year, both measure time.

Reason: Because light year is the time that light takes to reach the earth from the sun.

(A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(C) If assertion is true but reason is false.

(D) If the assertion and reason both are false.