PART - 2 CH - 13 Oscillations — Physics STD 11 Science — Question

The period of simple harmonic motion of a body suspended from a spring is cut the spring into two equal parts.
(a) Hang the same body from one spring and make it oscillate, then find the time period.
(b) What will be the period of oscillation if both the pieces are connected in parallel and oscillated?

Two spheres of the same external radius and made of the same material are heated to the same temperature one of them is hollow and the other is a solid sphere. Whose temperature will fall faster when cooled?

The heat capacities of the source and the sink should be infinite. Why so?

Consider a pair of identical pendulums, which oscillate with equal amplitude independently such that when one pendulum is at its extreme position making an angle of 2° to the right with the vertical, the other pendulum makes an angle of 1° to the left of the vertical. What is the phase difference between the pendulums?

The bob of a simple pendulum of length 1m has mass 100g and a speed of 1.4m/s at the lowest point in its path. Find the tension in the string at this instant.

A spring attached with a mass m oscillates with a frequency f. What will be the frequency when the same is taken to the moon? Why?

A 10m wide spacecraft moves through the interstellar space at a speed 3 × 10⁷m/s^-1. A magnetic field B = 3 × 10^-10T exists in the space in a direction perpendicular to the plane of motion. Treating the spacecraft as a conductor, calculate the emf induced across its width.

Write the factors affecting surface tension?

The density of water at 4°C is supposed to be 1000kg m³. Is it same at sea level and at high altitude?