Podcast
Questions and Answers
Which path do the lines of force follow in the figure shown?
Which path do the lines of force follow in the figure shown?
- 4 4 2
- 3 4 4
- 2 3 3
- 1 1 2 1 2 (correct)
In Millikan's oil drop experiment, if the potential difference required to hold a drop of half the radius stationary is 600 V, what is the charge on the second drop?
In Millikan's oil drop experiment, if the potential difference required to hold a drop of half the radius stationary is 600 V, what is the charge on the second drop?
- $2Q$
- $\frac{3Q}{4}$ (correct)
- $\frac{Q}{2}$
- Q
Equal charges $q$ are placed at the vertices A and B of an equilateral triangle ABC of side $a$. What is the magnitude of the electric field at the point C?
Equal charges $q$ are placed at the vertices A and B of an equilateral triangle ABC of side $a$. What is the magnitude of the electric field at the point C?
- $\frac{3q}{4\pi\epsilon_0a^2}$
- $\frac{q}{4\pi\epsilon_0a^2}$
- $\frac{2q}{4\pi\epsilon_0a^2}$ (correct)
- $\frac{q}{2\pi\epsilon_0a^2}$
An electron of mass $m_e$ and a proton of mass $m_p$ are both initially at rest and move through the same distance in a uniform electric field. If the time taken by the electron is $t_1$ and the time taken by the proton is $t_2$, the ratio $\frac{t_1}{t_2}$ is nearly equal to:
An electron of mass $m_e$ and a proton of mass $m_p$ are both initially at rest and move through the same distance in a uniform electric field. If the time taken by the electron is $t_1$ and the time taken by the proton is $t_2$, the ratio $\frac{t_1}{t_2}$ is nearly equal to:
Which of the following statements about the electric field lines shown in the figure is correct?
Which of the following statements about the electric field lines shown in the figure is correct?
Three identical point charges are placed at the vertices of an isosceles right-angled triangle. What can be concluded about the electric field at the vertex of the right angle?
Three identical point charges are placed at the vertices of an isosceles right-angled triangle. What can be concluded about the electric field at the vertex of the right angle?
What are the coordinates of point R?
What are the coordinates of point R?
Which expression represents the work done by the field in the process?
Which expression represents the work done by the field in the process?
What does the graph of the electric field due to a uniformly charged sphere of radius R as a function of distance look like?
What does the graph of the electric field due to a uniformly charged sphere of radius R as a function of distance look like?
How is the electrical field along a line (passing through the centre) of two concentric conducting spherical shells A and B with charges QA and -QB?
How is the electrical field along a line (passing through the centre) of two concentric conducting spherical shells A and B with charges QA and -QB?
If a solid conducting sphere of radius a has a net positive charge 2Q and a conducting spherical shell around it has a net charge -Q, what is the surface charge density on the outer surface of the shell?
If a solid conducting sphere of radius a has a net positive charge 2Q and a conducting spherical shell around it has a net charge -Q, what is the surface charge density on the outer surface of the shell?
If two charges in air repel each other with a force of 10^(-4) N and in oil with a force of 2.5 × 10^(-5) N, what is the dielectric constant of oil?
If two charges in air repel each other with a force of 10^(-4) N and in oil with a force of 2.5 × 10^(-5) N, what is the dielectric constant of oil?
If two metallic spheres of the same radii, one solid and one hollow, are given equal charges, which statement is correct?
If two metallic spheres of the same radii, one solid and one hollow, are given equal charges, which statement is correct?
If a charge $q$ is placed at the center of a line joining two equal charges $Q$, for the system to be in equilibrium, the value of $q$ must be:
If a charge $q$ is placed at the center of a line joining two equal charges $Q$, for the system to be in equilibrium, the value of $q$ must be:
In the diagram showing electric field lines emerging from a charged body, if the electric field strengths at points A and B are $E_A$ and $E_B$, respectively, and the displacement between A and B is $r$, which relationship is correct?
In the diagram showing electric field lines emerging from a charged body, if the electric field strengths at points A and B are $E_A$ and $E_B$, respectively, and the displacement between A and B is $r$, which relationship is correct?
To produce an electric field of $0.036 N/C$ just above the surface of a spherical conductor with a radius of $0.1 m$, the number of electrons that need to be placed on the conductor is approximately:
To produce an electric field of $0.036 N/C$ just above the surface of a spherical conductor with a radius of $0.1 m$, the number of electrons that need to be placed on the conductor is approximately:
In the diagram showing an uncharged metal sphere between two charged plates, the lines of force indicate that the metal sphere will:
In the diagram showing an uncharged metal sphere between two charged plates, the lines of force indicate that the metal sphere will:
When an uncharged capacitor is connected to a battery, what happens initially?
When an uncharged capacitor is connected to a battery, what happens initially?
