Two simple pendulums whose lengths are 100 cm and 121 cm are susp… - Vidyadip

MCQ

Two simple pendulums whose lengths are $100 \ cm$ and $121 \ cm$ are suspended side by side. Their bobs are pulled together and then released. After how many minimum oscillations of the longer pendulum, will the two be in phase again

A
$11$
✓
$10$
C
$21$
D
$20$

✓

Answer

Correct option: B.

$10$

Let $T_1$ and $T_2$ are the time period of the two pendulums $T_1=2 \pi \sqrt{\frac{100}{g}} \text { and } T_2=2 \pi \sqrt{\frac{121}{g}}\ (T_1)= 10$

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

Explore more

More "MCQ" from Simple Harmonic Motion→Simple Harmonic Motion — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A particle executes simple harmonic motion along a straight line with an amplitude $A$. The potential energy is maximum when the displacement is

If the temperature of the sun becomes twice its present temperature, then

A galvanometer having coil resistance $10 \ \Omega$ shows a full scale deflection for a current of $3 \mathrm{~mA}$. For it to measure a current of $8 \mathrm{~A}$, the value of the shunt should be:

A disc of radius $r$ and carrying positive charge $q$ is rotating with an angular speed $l$ in a uniform magnetic field $B$ about a fixed axis as shown in figure, such that angle made by axis of disc with magnetic field is $\theta $. Torque applied by axis on the disc is

Which statement is correct

The frequency of a FM transmitter without signal input is called

$n$ identical cells each of e.m.f. $E$ and internal resistance $r$ are connected in series. An external resistance $R$ is connected in series to this combination. The current through $R$ is

A device which converts electrical energy into mechanical energy is

If a coil made of conducting wires is rotated between poles pieces of the permanent magnet. The motion will generate a current and this device is called

Two spheres made of same material have radii in the ratio 1: 2 Both are at same temperature. Ratio of heat radiation energy emitted per second by them is