Physics Test - ...

The resistance \(R=\frac V I\) where \(V=(100 \pm 5) \mathrm{V}\) and \(I=(10 \pm 0.2) \mathrm{A}\). Find the percentage error in \(R\).

Which of the following statement is correct regarding S.H.M?

Which of the following substances has the least thermal conductivity?

Which of the following statement is correct?

Hooke's law states that within the elastic limit ________ is proportional to strain.

In the circuit shown in the figure, the total charge is \(750 \mu \mathrm{C}\) and the voltage across capacitor \(\mathrm{C}_2\) is \(20 \mathrm{~V}\). Then the charge on capacitor \(\mathrm{C}_2\) is :

A piece of glass of mass 100 g heated at \(350^{\circ}\) C is placed in 1 kg of water at \(23.6^{\circ}\) C. What is the final recorded temperature of the system? (The specific heat capacity of the glass = 0.8 J/g\(^{\circ}\) C and specific heat capacity of water = 4.0 J/g\(^{\circ}\) C).

Two solenoids having lengths L and 2L and the number of loops N and 4N, both have the same current, then the ratio of the magnetic field will be:

A nucleus with mass number 184 initially at rest emits an \(\alpha\) particle. If the \(\mathrm{Q}\) value of the reaction is \(5.5 \mathrm{M} \mathrm{eV}\), calculate the kinetic energy of the \(\alpha\) - particle.

Four identical hollow cylindrical columns of mild steel support a big structure of mass \(50 \times 10^3 kg\). The inner and outer radii of each column are \(50 cm\) and \(100 cm\), respectively. Assuming, uniform local distribution, calculate the compression strain of each column.

[Use, \(Y =2.0 \times 10^{11} Pa , g=9.8 m / s ^2\) ].