Question 1 :
Negative electric flux indicates that electric lines of force are directed
Question 2 :
Two identical metallic spheres A and B of exactly equal masses are given equal positive and negative charge respectively. Then:
Question 4 :
Two positive point charges $q_1$ and $q_2$ are kept at the distance d. If the distance between them is triple. Calculate by which factor new electrostatic force is decreased.<br/>
Question 5 :
Two coils 'P' and 'Q' are separated by some distance. When a current of $3$ A flows through coil 'P', a magnetic flux of $10^{-3}$ Wb passes through 'Q'. No current is passed through 'Q'. When no current passes through 'P' and a current of $2$A passes through 'Q', the flux through 'P' is?
Question 8 :
State whether true or false :Gauss law is applicable only when there is a symmetric distribution of charge.
Question 9 :
A charge + Q is located in space at the point $(x=1m,y=10m,z=5m)$. What is the total electric flux that passes through the yz-plane?
Question 10 :
Two metallic spheres, one hollow and the other solid, have same diameter. The hollow sphere will hold charge
Question 11 :
If a conductor has a potential $ V\neq 0 $ and there are no charges anywhere else outside, then
Question 12 :
A charge $\mathrm{Q}$ is placed at each of the opposite comers of a square. A charge $\mathrm{q}$ is placed at each of the other two corners. If the net electrical force on $\mathrm{Q}$ is zero, then $\mathrm{Q}/\mathrm{q}$ equals:<br>
Question 13 :
A uniform wire of length $2.0m$ and cross-sectional area ${ 10 }^{ -7 }{ m }^{ 2 }$ carries a current of $1.6A$. If there are ${10}^{28}$ free electrons per ${m}^{3}$ in copper, the drift speed of electrons in copper is
Question 14 :
A point charge of $100\mu$C is placed at $3 \widehat i + 4 \widehat j$ m. Find the electric field intensity due to this charge at a point located at $9 \widehat i + 12 \widehat j\  m $ :
Question 15 :
Which of the following is not a unit of charge ?
Question 16 :
A work of $200 J$ is done in moving a charge of  $-5 C$ from infinity to a particular point in an electrostatic field. The potential of this point is.......... .
Question 17 :
What is the new force of repulsion between A and B?
Question 18 :
A metal plate of surface area$2{m^2}$ is charged with$\sqrt {8.85} \,\mu C.$ What is the mechanical force acting on the plate if it is kept in air?$\left[ {{\varepsilon _0} = 8.85 \times {{10}^{ - 12}}{C^2}} \right]$
Question 19 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">At the centre of a cubical box $+ Q$ charge is placed. The value of total flux that is coming out of each face is :</p>
Question 20 :
Two charged particles having charges $+25\mu C$ and $+50\mu C$ are separated by a distance of 8 cm. The ratio of forces on them is: