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The nature of the graph between potential difference and the electric current flowing through a conductor is___________.

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Important Questions on Electrostatic Potential and Capacitance

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

N

number of charges,

+ Q

each, are placed maintaining equal distance on the circumference of a circle of radius

R .

The net electrostatic potential at the centre of the circle is

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

The variation of electrostatic potential with radial distance

r

from the centre of a positively charged metallic thin shell of radius

R

is given by the graph

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

A hot filament liberates an electron with zero initial velocity. The anode potential is

1200 V

. The speed of the electron when it strikes the anode is

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

An electron is placed on $X$ -axis where the electric potential depends on $x$ as shown in figures (the potential does not depend on $y$ and $z$ ). What is the electric force on the electron?

Question Image

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

The electric potential at a point

(x, y)

in the

x

y

plane is given by

V = - K x y

The electric field intensity at a distance

r

from the origin varies as

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

The maximum potential energy due to electrostatic repulsion between two hydrogen nucleus is nearly (radius of the nucleus

= 1.1

Fermi)

[\frac{1}{4 π ε_{0}} = 9 \times 10^{9} N m^{2} C^{- 2}]

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Figure shows three points $A, B$ and $C$ in a region of uniform electric Field $\vec{E}$ . The line $A B$ is perpendicular and $B C$ is parallel to the field lines. Then which of the following hold good? ( $V_{A}, V_{B}$ and $V_{C}$ represent the electric potential at points $A, B$ and $C$ respectively )

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

The electric intensity and electric potential at a certain distance

r

from a point charge in air are

150 V / m

and

300 V

respectively. Find the distance

r

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Assume that an electric field

\vec{E} = 30 x^{2} \hat{i}

exists in space. Then the potential difference

V_{A} - V_{O}

, where V_O is the potential at the origin and V_A the potential at x = 2 m is :

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Two metal plates are separated by

2 cm .

The potentials of the plates are

- 10 V

and

+ 30 V

. The electric field between the two plates is:

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

A mass of

1 kg

carrying a charge of

2 C

is accelerated through a potential of

1 V

. The velocity acquired by it is:

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

A metallic sphere is kept in between two oppositely charged plates. The most appropriate representation of the field lines is

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

A uniform electric field is prevailing in

X

- direction in certain region. The co-ordinates of points

P, Q,

and

R

are

(0, 0), (2, 0)

and

(0, 2)

respectively. Which of the following alternatives is true for the potentials at these points?

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

A Van de Graff generator has a spherical metal shell as an electrode which is at a potential

15 \times 10^{6} V

. If the dielectric strength of the surrounding medium is

5 \times 10^{7} {Vm}^{- 1}

then the diameter of the shell is

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

On the axis and on the equator of an electric dipole for all points ______

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

The variation of electric potential with distance from a fixed point is shown in the figure. What is the value of electric field at $x = 2 m ?$

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Two charges

8 μ C

each are placed at the comers A and B of an equilateral triangle of side

0.2 m

in air. The electric potential at the third comer C is

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

In a certain region of space with volume

0.2 m^{3}

, the electric potential is found to be

5 V

throughout. The magnitude of electric field in this region is:

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

An electron with an initial speed of

4 .0 \times 10^{6} m s^{- 1}

is brought to rest by an electric field. The mass and charge of an electron are

9 \times 10^{- 31} kg

and

1.6 \times 10^{- 19} C

, respectively. Identify the correct statement.

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

An electric field

\vec{E} = (25 \hat{i} + 30 \hat{j}) N C^{- 1}

exists in a region of space. If the potential at the origin is taken to be zero then the potential at

x = 2 m

y = 2 m

is:

The nature of the graph between potential difference and the electric current flowing through a conductor is___________.

Important Questions on Electrostatic Potential and Capacitance

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