Physics Test-10...

The electrostatic force of repulsion between two positively charged ions carrying equal charge is \(3.7 \times 10^{-9} N\), when they are separated by a distance of \(5 \mathring A\). How many electrons are missing from each ion?

In electrolytic solutions, which of the following acts as carrier of charge?

The velocity of a particle is \(60 \%\) of the velocity of light. Then the percentage increase in its mass is

A plane electromagnetic wave of frequency \(500 \mathrm{MHz}\) is travelling in vacuum along \(x, y, z\) - direction. At a particular point in space and time, \(\vec{B}=8.0 \times 10^{-8} \hat{z} T\). The value of electric field at this point is: (speed of light \(=3 \times 10^8 \mathrm{~ms}^{-1}\) ) Assume \(x, y, z\) are unit vectors along \(\widehat{x}, \hat{y} \ \& \ \hat{z}\) directions.

Which of the following is not a fundamental unit?

In a potentiometer experiment, for measuring internal resistance of a cell, the balance point has been obtained on the fourth wire. The balance point can be shifted to fifth wire by:

In which of the following compounds there is more than one kind of hybridization \(\left(\mathrm{sp}, \mathrm{sp}^{2}, \mathrm{sp}^{3}\right)\) for carbon?

The mean distance of mars from the sun is 1.5 times that of earth from the sun. What is approximately the number of years required by mars to make one revolution about the sun?

Potentiometer measures the potential difference more accurately than a voltmeter, because:

Which of the following is an example of a non- uniform accelerated motion?