Download App

8. Electromagnetic waves — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics8. Electromagnetic waves1 Mark
MCQ
A parallel plate capacitor is charged by connecting it to a battery through a resistor. If $l$ is the current in the circuit, then in the gap between the plates:
  • ✓
    Displacement current of magnitude equal to / flows in the same direction as /
  • B
    Displacement current of magnitude equal to / flows in a direction opposite to that of $I$
  • C
    Displacement current of magnitude greater than / flows but can be in any direction
  • D
    There is no current
✓

Answer

Correct option: A.
Displacement current of magnitude equal to / flows in the same direction as /
a
According to modified Ampere's law

$\oint B \cdot d l=\mu_0\left(I_C+I_D\right)$

$\text { For Loop } L_1 \quad I_C \neq 0 \text { and } I_D=0$

$\text { For Loop } L_2 \quad I_C=0 \text { and } I_D \neq 0$

$\text { Due to KCL } \quad I_C=I_D$

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

Explore more

More "M.C.Q (1 Marks)" from 8. Electromagnetic waves→8. Electromagnetic waves — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

In the given network capacitance, ${C_1} = 10\,\mu \,F,\,{C_2} = 5\,\mu \,F$ and ${C_3} = 4\,\mu \,F$. What is the resultant capacitance between $A$ and $B$.......$\mu \,F$
→
A free neutron decays into a proton but a free proton does not decay into neutron. This is because
→
Energy is stored in a capacitor in the form of:
→
An electrical circuit consists of ten $100 \,\Omega$ resistors. Out of these $10$ resistors, a group of $n _1$ resistors are connected in parallel and another group of $n _2$ resistors are separately connected in parallel. These two groups are then connected in series and this combination is connected to a voltage source of $100 \,V$. If the net current though the circuit is $2.5 \,A$. The values of $n _1$ and $n _2$ are
→
At time $t=0$, a container has $N_{0}$ radioactive atoms with a decay constant $\lambda$. In addition, $c$ numbers of atoms of the same type are being added to the container per unit time. How many atoms of this type are there at $t=T$ ?
→
If the electric potential of the inner metal sphere is $10$ $ volt$ $\&$ that of the outer shell is $5$ $volt$, then the potential at the centre will be ......$volt$
→
In an $AC$ generator, a coil with $N$ turns, all of the same area $A$ and total resistance $R,$ rotates with frequency $1rad/ s$ in a magnetic field $B$. The maximum value of emf generated in the coil is:
→
An electron is moving in a circular orbit of radius $R$ with an angular acceleration $\alpha$ At the center of the orbit is kept a conducting loop of radius , $(r < r)$
→
A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then distance d in cm will be
→
The resistance of a wire is$10\,\Omega $. Its length is increased by $10\%$ by stretching. The new resistance will now be .......... $\Omega$
→