Physics Past Questions and Answers

An electric string of length \(X\) is stretched through a length by force F. The area of cross-section of the string is \(A\) and its young modulus is \(E\).
Which of the following expression is correct?

The density of a solid is \(130 gcm 3\) at the temperature of \(25^{\circ} C\). Find the density at \(150^{\circ} C\) the linear expansion of the solid is \(2.0 \times 105 K 1\).

A bullet leaves the barrel of a gun with a speed of \(80 ms\). If the barrel is 20 theng. Lindthe acceleration of the bullet.

Sound and water waves are classified as mechanical waves and they carnotbe propagated in one of the following media

A capacitor of \(2.0 \times 10^{-11 F }\) and an inductor are joined in series. The value of the inductance that will give the circuit a resonant frequency of \(200 kHz\) is ____________