Nuclei — Physics STD 12 Science — Question

The elastic limit of steel is 8 × 10⁸N/m² and its Young's modulus 2 x 10¹¹N/m². Find the maximum elongation of a half meter steel wire that can be given without exceeding the elastic limit.

In what way is the behaviour of a diamagnetic material different from that of a  paramagnetic, when kept in an external magnetic field.

What is the concept of direction of electric current ?

Find the ratio of the weights, as measured by a spring balance, of a 1kg block of iron and a 1kg block of wood. Density of iro = 7800Kg/m³ density of wood = 800kg/m³ and density of air = 1.293kg/m³.

In the circuit shown below, the potential at point A is 100 volts. What will be the potential at point B?

Which part of electromagnetic spectrum does the wavelength 10^-10m correspond to?

What is the direction of magnetic field lines produced around a long current carrying conductor?

Write the magnitude of average value of alternating current for a complete cycle.

To which part of the electromagnetic spectrum does a wave of frequency 5 x 10¹⁹ Hz belong?

Is current density a scalar or a vector quantity?