Recent questions in Model Papers

A uniformly charged conducting sphere of $2.4\;m$ diameter has a surface charge density of $80.0 \mu c/m^2$ a) find the charge on the sphere b) what is the total electric flux leaving the surface of the sphere ?

asked Apr 28, 2015 by meena.p

1 answer

A conducting sphere of radius $10\;cm$ has an unknown charge. If the electric field $20\;cm$ from the center of the sphere is $1.5 \times 19^3 N/C$ points radially inwards , what is the net charge on the sphere.

asked Apr 28, 2015 by meena.p

1 answer

A point charge causes an electric flux of $-1.0 \times 10^{3} Nm^2/C$ . to pass through a spherical gaussian surface of $10.0\;cm$ radius centred on the charge . What is the value of the point charge ?

asked Apr 28, 2015 by meena.p

1 answer

A point charge causes an electric flux of $-1.0 \times 10^{3} Nm^2/C$ . to pass through a spherical gaussian surface of $10.0\;cm$ radius centred on the charge .If the radius of the gauassian surface were doubled, how much flux would pass through the surface ?

asked Apr 28, 2015 by meena.p

1 answer

A point charge of $2.0 \mu C$ is at the centre of a cubic guassian surface $9.0\;cm$ on edge. What is the net electric flux through the surface ?

asked Apr 27, 2015 by meena.p

1 answer

A point charge $+10 \mu c$ is at a distance $5\;cm$ directly above the center of a square of side $10\;cm$ , as shown in fig. What is the magnitude of the electric flux through the square . (Hint : Think of the square as one face of a cube with edge 10 cm)

asked Apr 27, 2015 by meena.p

1 answer

Careful measurement of the electric field at the surface of a block box indicates that the net outward flux through the surface of the box is $8.0 \times 10^3 \;N-m^2 /C$ .If the net outward flux through the surface of the box were zero, could you conclude that there were no changes inside the $60 x?$ Why or why not ?

asked Apr 27, 2015 by meena.p

1 answer

Careful measurement of the electric field at the surface of a block box indicates that the net outward flux through the surface of the box is $8.0 \times 10^3 \;N-m^2 /C$ . What is the net change inside the box ?

asked Apr 27, 2015 by meena.p

1 answer

What is the net flux of the uniform electric field $E= 3 \times 10^{3}\; N/C$ through a cube of side $20\;cm$ oriented .So that its faces are parallel to the coordinate plane?

asked Apr 27, 2015 by meena.p

0 answers

What is the net flux of the uniform electric field $E= 3 \times 10^{3}\; N/C$ through a cube of side $20\;cm$ oriented .So that its faces are parallel to the coordinate plane?

asked Apr 27, 2015 by meena.p

1 answer

Consider a uniform electric field $E=3 \times 10 \times 10^3 \hat i N/C$ . What is the flase through the same square if the normal to its plane makes an angle of $60^{\circ}$ with the x- axis ?

asked Apr 27, 2015 by meena.p

1 answer

Consider a uniform electric field $E=3 \times 10 \times 10^3 \hat i N/C$ . What is the flux of this foeld through a square of $10 \;cm$ a side whose plane is parallel to the y-z plane ?

asked Apr 27, 2015 by meena.p

1 answer

An electric dipole with dipole moment $4 \times 10^{-9} \;cm$ is aligned at $30^{\circ}$ with the direction of a uniform electric field of magnitude $5 \times 10^4 N/C$ on the torque acting on the dipole .

asked Apr 27, 2015 by meena.p

1 answer

A system has two changes $q_A= 2.5 \times 10^{-7} C$ and $q_B= -2.5 \times 10^{-7}\;C$ located at points $A( 0,0)\;-15 \;cm$ and $B(0,0,+15\;cm)$ and $B( 0,0,+15\;cm)$ respectively. What are the total change and electric dipole moment of the system ?

asked Apr 27, 2015 by meena.p

1 answer

When a glass red is rubbed with a silk cloth, charge appear on both. A similar phenomenou is observed many other pairs of bodies. Explain how this phenomenon is consistent with the land of conservation charges.

asked Apr 27, 2015 by meena.p

1 answer

Why can one ignore quantization of electric charge when dealing with maeroscopic large scale charge ?

asked Apr 27, 2015 by meena.p

1 answer

Explain the meaning of the statement electronic charge of a body is quantizized .

asked Apr 27, 2015 by meena.p

1 answer

What is the force between two charged spheres having charges of $2 \times 10^{-7}\;C$ and $3 \times 10^{-7} C$ placed $30\;cm$ apart in air?

asked Apr 27, 2015 by meena.p

1 answer

Two points charges $+Q$ and $+4Q$ are seperated by a distance of $6a$ . find the point on the line joining the two charges where the electric field is zero.

asked Apr 27, 2015 by meena.p

1 answer

How many electrons must be removed from a ball of mass $3.2 \;g$ so that it may fleat in an electric field of intensity $10^{10}N/C$ directed upwards?

asked Apr 27, 2015 by meena.p

1 answer

An electron and proton are freely located in an electric field. Compare (i) electric force on them (ii) the acceleration on them

asked Apr 24, 2015 by meena.p

1 answer

An infinite line charge produces a field of $9 \times 10^4 \;N/C$ at a distance of $2 \;cm$ . calculated linear charge density.

asked Apr 24, 2015 by meena.p

1 answer

A uniformly charged conducting sphere of diameter $2.4 \;m$ has a surface charge density of $80.0\;\mu C/m^2$ (i) Find the charge on the sphere (ii) what is the total electric flux leaving the surface of the sphere?

asked Apr 24, 2015 by meena.p

1 answer

A uniformly charged conducting sphere of diameter $2.4\;m$ has a surface charge density of $80.0\;\mu c/m^2$ (i) Find the charge on the sphere (ii) What is the total electric flux leaving the surface of the sphere ?

asked Apr 24, 2015 by meena.p

1 answer

This figure represents the electric lines of force at constant potentials, Shown in constant,Potentials, shown in bracket . At which point A , B and C is the electric field maximum ?

asked Apr 24, 2015 by meena.p

1 answer

A cylinder of radius R and length L is placed in a uniform electric field parallel to the axis of a cylinder. What is the electric flux through the whole cylinder ?

asked Apr 24, 2015 by meena.p

1 answer

If a point charge be rotated in an arc of radius r around a change q, what will be the workdone ? explain

asked Apr 24, 2015 by meena.p

1 answer

If a point charge be rotated in an arc of radius r around a change q, what will be the workdone ? explain

asked Apr 24, 2015 by meena.p

1 answer

A is a metallic sphere placed between two charged metallic plates. A student draws the line of force as shown in the figure . Is he correct ?

asked Apr 24, 2015 by meena.p

1 answer

An electron and a proton are brought hearer. What will be the effect on potential energy of system ?

asked Apr 24, 2015 by meena.p

1 answer

Can electric field at a point be zero, while electric potential is not zero ?

asked Apr 24, 2015 by meena.p

1 answer

Is electric flux a scalar or a vector quantity ? Write electric flux as a scalar product of two vectors .

asked Apr 24, 2015 by meena.p

1 answer

A proton and an electron are placed freely in an electric field. Which of the partides will have greater acceleration and why ?

asked Apr 24, 2015 by meena.p

1 answer

A man in an insulted metallic cage does not receive a shock, even when the cage is connected to a high voltage source . Whay ?

asked Apr 24, 2015 by meena.p

1 answer

Electrostatic experiments do not work during humid days . Explain

asked Apr 24, 2015 by meena.p

1 answer

You are given three uncharged spherical conductors A,B, and C touching each other . A glass rod carrying positive charge is brought near sphere A as shown. What will be the charges on spheres A,B and C?

asked Apr 24, 2015 by meena.p

1 answer

A metallic sphere is placed in a uniform electric field as shown in the figure. which path is folllowed by electric field lines? why ?

asked Apr 24, 2015 by meena.p

2 answers

Name the dielectric whose molecules have (i) non- zero and (ii) zero dipole moment.

asked Apr 22, 2015 by meena.p

1 answer

Why two electric lines of force cannot intersect each other ?

asked Apr 22, 2015 by meena.p

1 answer

Does the charge outside the guassian surface contribute to total electric flux ?

asked Apr 22, 2015 by meena.p

1 answer

What is the solid subtended by a hemisphere at a point inside it ?

asked Apr 22, 2015 by meena.p

1 answer

An arbitrary surface encloses a dipole, What is the electric flux through this surface ?

asked Apr 22, 2015 by meena.p

1 answer

What is the net flux of the uniform electric field through a cube of side $20\;cm$ oriented so that its faces are parallel to the coordinate planes?

asked Apr 22, 2015 by meena.p

1 answer

Figure shows three point changes $+2q,-q,+3q$ Two changes $+2q$ and $-q$ are enclosed with a surface S. What is the electric flux due to this configuration through the surface S?

asked Apr 22, 2015 by meena.p

1 answer

Figure shows three point changes $+2q,-q,+3q$ Two changes $+2q$ and $-q$ are enclosed with a surface S. What is the electric flux due to this configuration through the surface S?

asked Apr 22, 2015 by meena.p

0 answers

What is the number of electric lines of force that radiate outward from one coulomb of change in vacuum ?

asked Apr 22, 2015 by meena.p

1 answer

An electric dipole moment $20 \times 10^{-6}\;C$ is enclosed by closed surface . what is net electric flux coming out of this surface ?

asked Apr 22, 2015 by meena.p

1 answer

An ebonite red held in hand can be charged by rubbing with flannel , but a copper rod cannot be changed like this way ?

asked Apr 22, 2015 by meena.p

1 answer

Quarles are building blocks of nucleus and posses fractional electronic charge. Does this discovers violate the principal of quantisation of charge ?

asked Apr 22, 2015 by meena.p

1 answer

Electrostatic forces are much stronger than, gravitational force. Give one example.

asked Apr 22, 2015 by meena.p

1 answer

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