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Q81. The angle of $1’$ (minute of an arc) in radian is nearly equal to:

$2.91 \times 10^{-4}~\text{rad}$
$4.85 \times 10^{-4}~\text{rad}$
$4.80 \times 10^{-6} ~\text{rad}$
$1.75 \times 10^{-2}~\text{rad}$

Exam: NEET – 2020

Q82.

Dimensions of stress are:

${\left[{ML}^2 {T}^{-2}\right]}$
${\left[{ML}^0 {T}^{-2}\right]}$
${\left[{ML}^{-1} {T}^{-2}\right]}$
${\left[{MLT}^{-2}\right]}$

Exam: NEET – 2020

Q83.

The energy required to break one bond in DNA is $10^{-20}~\text{J}$ . This value in eV is nearly:

$0.6$
$0.06$
$0.006$
$6$

Exam: NEET – 2020

Q84. Taking into account the significant figures, what is the value of $(9.99~\text{m}-0.0099~\text{m})$ ?

$9.98~\text{m}$
$9.980~\text{m}$
$9.9~\text{m}$
$9.9801~\text{m}$

Exam: NEET – 2020

Q85.

A screw gauge has the least count of $0.01~\text{mm}$ and there are $50$ divisions in its circular scale. The pitch of the screw gauge is:

$0.25~\text{mm}$
$0.5~\text{mm}$
$1.0~\text{mm}$
$0.01~\text{mm}$

Exam: NEET – 2020

Q86. If $E$ and $G$ respectively, denote energy and gravitational constant, then $\dfrac{E}{G}$ has the dimensions of:

$[ML^0T^0]$
$[M^2L^{-2}T^{-1}]$
$[M^2L^{-1}T^{0}]$
$[ML^{-1}T^{-1}]$

Exam: NEET – 2021

Q87.

A screw gauge gives the following readings when used to measure the diameter of a wire:
Main scale reading: $0$ mm
Circular scale reading: $52$ divisions
Given that $1$ mm on the main scale corresponds to $100$ divisions on the circular scale, the diameter of the wire that can be inferred from the given data is: