Physics Test-34...

A geyser heats water flowing at the rate of \(3.0\) litres per minute from \(27^{\circ} C\) to \(77^{\circ} C\). If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is \(4.0 \times 10^{4} J / g\) ?

A force applied by the engine of a train of mass \(2.05 \times 10^{6} \mathrm{~kg}\) changes its velocity from \(5 \mathrm{~ms}^{-1}\) to \(25 \mathrm{~ms}^{-1}\) in 5 minutes. The power of the engine is then,

The expression \(\frac{I \omega^2} { 2}\) represents rotational ____________.

When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______ gas.

The Electromagnetic waves are:

On increasing the temperature of a semiconductor diode, its resistance _________.

The current sensitivity of a moving coil galvanometer increases by 20% when its resistance increases by a factor 2 while keeping the number of turns constant. The voltage sensitivity changes by how much?

Bernoulli’s theorem is applicable only for ________.

Two planets orbit the Sun in circular orbits, with their radius of orbit as \(\mathrm{R}_{1}=\mathbf{R}\) and \(\mathrm{R}_{2}=4 R\). Ratio of their periods \(\left(\frac{T_{1} }{ T_{2}}\right)\) around the Sun will be:

Two waves represented by \(\mathrm{y}_{1}=10 \sin (2000 \pi \mathrm{t})\) and \(\mathrm{y}_{2}=10 \sin (2000 \pi \mathrm{t}+\pi / 2)\) are superimposed at any point at a particular instant. The resultant amplitude is: