A bird alights on a stretched telegraph wire. Does this change the tension in the wire ? If so,by an amount less than, equal to, or greater than the weight of the bird ?

A sparrow flying in air sits on a stretched telegraph wire If weight of the sparrow is W which of the following is true about the tension T produced in the wire ?

Photon A has twice the energy of photon B. (a) If the momentum of A less than, or equal to , or greater than that of B? (b) is the wavelength of A less than, equal to, or greater than that of B?

A wire of length is stretched by a force F to cause an extension x. Another wire of same material and same volume but 50% larger in length than the first wire, the force required for the same extension will be

For a non singular matrix A of order n the rank of A is (A) less than n (B) equal to n (C) greater than n (D) none of these

A bird sitting on a single high tension wire does not get electrocuted because

A small ball of mass m is attached to the middle of a tightly stretched perfectly flexible wire AB of length 2 l (figure ). The ball is given a small lateral displacement in horizontal direction and released. The initial tension (T) in the wire is high and change in it due to small lateral displacement of the ball can be neglected. Prove that the ball will perform simple harmonic motion, and calculate the period. If there is a device which can change the tension in the wire at will , how will the time period change if tension in the wire is increased

If you lift a body to aheight h with a force that is equal to the weight of a body,how much work is done and if you lift it with a force that is greater than the weight of a body,where does the extra energy go ?

If alpha means greater than', beta means equal to', theta means 'not less than'. gamma means 'less than', delta means 'not equal to' and eta means 'not greater than', then which of the four alternatives could be a correct or proper inference in pach of the following ? a alpha 2b and 2b theta r

If alpha means greater than', beta means equal to', theta means 'not less than'. gamma means 'less than', delta means 'not equal to' and eta means 'not greater than', then which of the four alternatives could be a correct or proper inference in pach of the following ? 2x delta y and y beta 3 z