Units and Measu...

1-Light year equal to

Select the pair whose dimensions are same

One angstrom is equal to

The displacement of a particle is represented by the equation, s = \(3t^3 + 7t^2 + 4t + 8\) where (s) is in metres and (t) in seconds. The acceleration(\(in\) \(m/s^2\) )of the particle at t = 1s is

What is the unit of magnetic flux is

Fathom is the unit to measure the

What is the SI unit of Permittivity?

1kWh =

What is the largest practical unit of mass?

"Dry ice" also known as

The pair of quantities having same dimensions is

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

Light of wavelength is 7200 Å in air. It has a wavelength in glass (µ = 1.5) equal to

The SI unit of heat capacity

If unit of length and time is doubled the numerical value of g (acceleration due to gravity) will be:

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

When 10 observations are taken, the random error is x, When 100 observations are taken, the random error becomes

The mass and volume of a body are 4.237 g and 2.5 \(cm^3\), respectively. The density of the material of the body in correct significant figures is

Assertion: 'Light year' and 'Wavelength' both measure distance.

Reason: Both have dimensions of time.

(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 the reason is false.

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