Question:
If two similar springs each of spring constant \(K_1\) are joined in series, the new spring constant and time period would be changed by a factor :
If two similar springs each of spring constant \(K_1\) are joined in series, the new spring constant and time period would be changed by a factor :
Show Hint
For two identical springs in series, \(K_{eq} = K_1/2\); then use \(T = 2\pi\sqrt{m/K}\) to see how the period scales.
Updated On: Nov 4, 2026
- \(\frac{1}{2}, 2\sqrt{2}\)
- \(\frac{1}{4}, 2\sqrt{2}\)
- \(\frac{1}{2}, \sqrt{2}\)
- \(\frac{1}{4}, \sqrt{2}\)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Springs in series: \(\frac{1}{K_{eq}} = \frac{1}{K_1}+\frac{1}{K_1} = \frac{2}{K_1}\), so \(K_{eq} = \frac{K_1}{2}\). The spring constant changes by a factor \(\frac{1}{2}\).
Time period \(T = 2\pi\sqrt{\frac{m}{K}}\) gives \(T \propto K^{-1/2}\).
\(\frac{T'}{T} = \sqrt{\frac{K_1}{K_1/2}} = \sqrt{2}\).
Hence the factors are \(\frac{1}{2}\) and \(\sqrt{2}\).
Answer: (3) \(\frac{1}{2}, \sqrt{2}\)
Time period \(T = 2\pi\sqrt{\frac{m}{K}}\) gives \(T \propto K^{-1/2}\).
\(\frac{T'}{T} = \sqrt{\frac{K_1}{K_1/2}} = \sqrt{2}\).
Hence the factors are \(\frac{1}{2}\) and \(\sqrt{2}\).
Answer: (3) \(\frac{1}{2}, \sqrt{2}\)
Was this answer helpful?
0
0
Top JEE Main Physics Questions
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,
- $I _{ CM }$ is the moment of inertia of a circular disc about an axis (CM) passing through its center and perpendicular to the plane of disc $I_{A B}$ is it's moment of inertia about an axis $AB$ perpendicular to plane and parallel to axis $CM$ at a distance $\frac{2}{3} R$ from center Where $R$ is the radius of the dise The ratio of $I _{ AB }$ and $I _{ CM }$ is $x: 9$ The value of $x$ is______
- A nucleus disintegrates into two smaller parts, which have their velocities in the ratio $3: 2$ The ratio of their nuclear sizes will be $\left(\frac{x}{3}\right)^{\frac{1}{3}}$ The value of ' $x$ ' is:-
- A particle starts with an initial velocity of 10.0 m/s along x-direction and accelerates uniformly at the rate of 2.0 m/s$^2$. The time taken by the particle to reach the velocity of 60.0 m/s is
View More Questions
Top JEE Main Waves and Oscillations Questions
- The period of oscillation of system shown below is \(π\sqrt{\bigg(\frac{\alpha M}{5K}\bigg)}\) then \(\alpha\) is
- A simple harmonic oscillator has an amplitude \( A \) and a time period of \( 6\pi \) seconds. Assuming the oscillation starts from its mean position, the time required by it to travel from \( x = A \) to \( x = \frac{\sqrt{3}}{2} A \) will be \( \frac{\pi}{x} \) seconds, where \( x = \, \underline{\hspace{2cm}} \).
- A particle executes simple harmonic motion with an amplitude of 4 cm. At the mean position, the velocity of the particle is 10 cm/s. The distance of the particle from the mean position when its speed becomes 5 cm/s is \( \sqrt{\alpha} \) cm, where $\alpha$ = ______
- A tuning fork resonates with a sonometer wire of length 1 m stretched with a tension of 6 N. When the tension in the wire is changed to 54 N, the same tuning fork produces 12 beats per second with it. The frequency of the tuning fork is _______ Hz.
- A particle performs simple harmonic motion with amplitude \( A \). Its speed is increased to three times at an instant when its displacement is \( \frac{2A}{3} \). The new amplitude of motion is \( \frac{nA}{3} \). The value of \( n \) is _____.
View More Questions
Top JEE Main Questions
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- The value of is
- The number of terms of an is even. The sum of the odd terms is and of the even terms is . The last term exceeds the first by . Then the number of terms in the series is ______.
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,
View More Questions