Question
Draw the electric field lines due to a uniformly charged thin spherical shell when charge on the shell is (a) positive and (b) negative.

Answer

The electric field lines are shown in the figure. For a positively charged shell, the field lines are directed in radially outward direction and for negatively charged shell, these are directed in radially inward direction.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A block of 2kg is suspended from the ceiling through a massless spring of spring constant k = 100N/m. What is the elongation of the spring? If another 1kg is added to the block, what would be the further elongation?
An element $\Delta l =\Delta x \hat{ i }$ is placed at the origin and carries a large current $I=10 A \ ($Fig. $4.8).$ What is the magnetic field on the $y$ axis at a distance of $0.5 m . \Delta x=1 \ cm$.
Image
A monkey is climbing on a rope that goes over a smooth light pulley and supports a block of equal mass at the other end figure. Show that whatever force the monkey exerts on the rope, the monkey and the blockmove in the same direction with equal acceleration. If initially both were at rest, their separation will not change as time passes.
A magnetic flux of $8 \times 10^{-4}$ weber is linked with each turn of a $200-$turn coil when there is an electric current of $4A$ in it. Calculate the self$-$inductance of the coil.
A spherical shell made of plastic, contains a charge Q distributed uniformly over its surface. What is the electric field inside the shell? If the shell is hammered to deshape it without altering the charge, will the field inside be changed? What happens if the shell is made of a metal?
You are given a circuit below. Write its truth table. Hence, identify the logic operation carried out by this circuit. Draw the logic symbol of the gate it corresponds to.
Figure shows a rectangular conducting loop $\text{PQRS}$ in which arm $RS$ of length I is movable. The loop is kept in a uniform magnetic field $B$ directed downward perpendicular to the plane of the loop. The arm $RS$ is moved with a uniform speed $v$.
Image

Deduce an expression for
$i$. the emf induced across the arm $RS$
$ii.$  the external force required to move the arm and
$iii.$ the power dissipated as heat.
How is the mutual inductance of a pair of coils affected when:
i. separation between the coils is increased?
ii. the number of turns of each coil is increased?
iii. A thin iron sheet is placed between the two coils, other factors remaining the same?
On the basis of the charging of capacitor, clarify that there is something missing in the Ampere circuital law.
State the principle of a cyclotron. Show that the time period of revolution of particles in a cyclotron is independent of their speeds. Why is this property necessary for the operation of a cyclotron?