The first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________?

Related Mcqs:

1. The speed of stationary waves in a stretched string are independent of___________________?

   A. Number of loops
   B. Tension in the string
   C. Point where string is plucked
   D. both A and C

2. A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________?

   A. FE
   B. (FE)
   C. FE2/L
   D. FE2

3. A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is______________?

   A. Maximum
   B. Zero
   C. Equal to the weight of the stone
   D. Less than the weight of the stone

4. A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?

   A. f2 + f1
   B. f2 – f1
   C. f1f2/f2+f1
   D. f1f2/f1-f2

5. A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?

   A. The extension of the wire is proportional to the force applied
   B. The weight of the wire is negligible
   C. The wire is not stretched beyond its elastic limit
   D. The cross sectional area of the wire remains constant

6. A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ?

   A. 0.01J
   B. 0.02J
   C. 0.04J
   D. 1.0J

7. Simple harmonic motion is a type of________________?

   A. Rotational motion
   B. Circular motion
   C. Musical arrangement
   D. Vibratory motion

8. In damped harmonic oscillation which one decreases ?

   A. Amplitude of vibration
   B. Energy of vibration
   C. Both amplitude and energy
   D. Neither amplitude nor energy

9. When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________?

   A. Mass of a body
   B. Velocity of body
   C. The tension in the string
   D. Centripetal acceleration

10. What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?

    A. 1N
    B. 10N
    C. 2N
    D. 100N