Physics Test - ...

The heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V is:

A Newtonian fluid fills the clearance between a shaft and a sleeve. When a force of \(0.9 kN\) is applied to the shaft parallel to the sleeve, the shaft attains a speed of \(1.25 cm / s\). What will be the speed of the shaft if a force of \(3 kN\) is applied?

A charge \(\mathrm{q}\) is distributed uniformly on a ring of radius \(\mathrm{r}\). A sphere of equal radius \(\mathrm{r}\) is constructed with its center at the periphery of the ring. The electric flux through the surface of the sphere is:

If two bulbs, one of 200 W and the other of 100 W are connected in series with a 100 V battery, then which bulb will have more brightness:

The pressure inside a soap bubble of \(10 mm\) diameter above the atmosphere is \((\sigma=\) \(0.04 N / m\) )

The temperature of equal masses of three different liquids \(x, y\) and \(\mathrm{z}\) are \(10^{\circ} \mathrm{C}, 20^{\circ} \mathrm{C}\) and \(30^{\circ} \mathrm{C}\), respectively. The temperature of mixture when \(\mathrm{x}\) is mixed with \(\mathrm{y}\) is \(16^{\circ} \mathrm{C}\) and that when \(\mathrm{y}\) is mixed with \(\mathrm{z}\) is \(26^{\circ} \mathrm{C}\). The temperature of mixture when \(\mathrm{x}\) and \(\mathrm{z}\) are mixed will be:

In an LCR circuit, the pd between the terminals of the inductance is \(60 V\), between the terminals of the capacitor is \(30 V\) and that between the terminals of resistance is \(40 V\). The supply voltage will be equal to:

The ratio of \(\frac{C_{p}}{C_{v}}\) for a rigid diatomic gas is? (\(C_{p}\) and \(C_{v}\) are molar specific heats at constant pressure and constant volume respectively)

On heating a ferromagnetic substance above Curie temperature ______________.