MCQ
Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.

Assertion $(A)$:The stretching of a spring is determined by the shear modulus of the material of the spring.

Reason $(R)$:A coil spring of copper has more tensile strength than a steel spring of same dimensions.

In the light of the above statements, choose the most appropriate answer from the options given below:

  • A
    Both $(A)$ and $(R)$ are true and $(R)$ is not the correct explanation of $(A)$
  • $(A)$ is true but $(R)$ is false
  • C
    $(A)$ is false but $(R)$ is true
  • D
    Both $(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $(A)$

Answer

Correct option: B.
$(A)$ is true but $(R)$ is false
b
In stretching of a spring shape charges therefore shear modulus is used.

$Y _{\text {copper }}< Y _{\text {stoel }}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The order of the size of nucleus and Bohr radius of an atom respectively are
A substance is behaving as convex lens in air and concave in water, then its refractive index is
A body executes simple harmonic motion. The potential energy $(P.E.)$, the kinetic energy $(K.E.)$ and total energy $(T.E.)$ are measured as a function of displacement $x$. Which of the following statements is true
The current through a wire depends on time as $i = (2+3t)\, mA$. The charge crossing through a section of the wire in $1\, min$ is .............. $\mathrm{C}$
A pan balance has a container of water with an overflow spout on the right-hand pan as shown. It is full of water right up to the overflow spout. A container on the left-hand pan is positioned to catch any water that overflows. The entire apparatus is adjusted so that it’s balanced. A brass weight on the end of a string is then lowered into the water, but not allowed to rest on the bottom of the container. What happens next ?
If a proton, deutron and $\alpha - $ particle on being accelerated by the same potential difference enters perpendicular to the magnetic field, then the ratio of their kinetic energies is
A circuit contains two inductors of self inductance $L_1$ and $L_2$ in series (Fig). If $M$ is the mutual inductance, then the effective inductance of the circuit shown will be
Two coherent sources of sound, $S_{1}$ and $S_{2}$ produce sound waves of the same wavelength, $\lambda=1\, m ,$ in phase. $S_{1}$ and $S_{2}$ are placed $1.5\, m$ apart (see fig.) A listener, located at $L,$ directly in front of $S_{2}$ finds that the intensity is at a minimum when he is $2\,m$ away from $S _{2}$. The listener moves away from $S _{1},$ keeping his distance from $S_{2}$ fixed. The adjacent maximum of intensity is observed when the listener is at a distance $d$ from $S$$_{1}$. Then, $d$ is$......m$
A perfect gas of a given mass is heated first in a small vessel and then in a large vessel, such that their volumes remain unchanged. The $P-T$ curves are
There are two particles $P$ and $Q$ separated by distance $10\ km$ and moving with velocities $10\ kmph$ as shown on a smooth horizontal surface. The time elapsed before they come at minimum separation is.........$hr$