# OSCILLATIONS (TEST-4)

T

2 T

A weightless spring of length 60 cm and force constant 200 N/m is kept straight and unscratched on a smooth horizontal table and its ends are rigidly fixed. A mass of 0.25 kg is attached at the middle of the spring and is slightly displaced along the length. The time period of the oscillation of the mass is ____.

If a spring extends by x on loading, then energy stored by the spring is (if T is the tension in the spring and K is the spring constant) ____.

/

2 : 1

1 : 2

4 : 1

1 : 4

When a body of mass 1.0 kg is suspended from a certain light spring hanging vertically, its length increases by 5 cm. By suspending 2.0 kg block to the spring and if the block is pulled through 10 cm and released the maximum velocity in it in m/s is: (Acceleration due to gravity=10m/s2) ____.

0.5

1

2

4

/

4 cm

3 cm

2 cm

1 cm

To make the frequency double of a spring oscillator, we have to ____.

reduce the mass to one fourth

quadruple the mass

double of mass

half of the mass

Infinite springs with force constant k, 2k, 4k and 8k.... respectively are connected in series. The effective force constant of the spring is ____.

2 K

K

2048

/

/

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**Description:**

OSCILLATIONS AND SIMPLE HARMONIC MOTION

**Tags:**

AIEEE Physics: Oscillations AIPMT Physics: Oscillations IIT JEE Physics: OSCILLATIONS MEDICAL ENTRANCE: OSCILLATIONS CBSE – XI PHYSICS: OSCILLATIONS ENGINEERING ENTRANCE PHYSICS: OSCILLATIONS

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