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Recent questions tagged ch-1
Questions
What is the solid subtended by a hemisphere at a point inside it ?
cbse
class12
physics
ch-1
sec-a
q35
difficult
asked
Apr 22, 2015
by
meena.p
1
answer
An arbitrary surface encloses a dipole, What is the electric flux through this surface ?
cbse
class12
physics
ch-1
sec-a
q34
easy
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?
cbse
class12
physics
ch-1
sec-a
q33
medium
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?
cbse
class12
physics
ch-1
sec-a
q32
medium
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?
cbse
class12
physics
ch-1
sec-a
q32
medium
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 ?
cbse
class12
physics
ch-1
sec-a
q31
easy
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 ?
cbse
class12
physics
ch-1
sec-a
q30
medium
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 ?
cbse
class12
physics
ch-1
sec-a
q29
medium
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 ?
cbse
class12
physics
ch-1
sec-a
q28
difficult
asked
Apr 22, 2015
by
meena.p
1
answer
Electrostatic forces are much stronger than, gravitational force. Give one example.
cbse
class12
physics
ch-1
sec-a
q27
medium
asked
Apr 22, 2015
by
meena.p
1
answer
From the number of electrons in $lc$ of negative charge.
cbse
class12
physics
ch-1
sec-a
q26
difficult
asked
Apr 22, 2015
by
meena.p
1
answer
Consider three charged bodies A,B and C. If A and repel each and A attracts C, What is the nature of force between B and C ?
cbse
class12
physics
ch-1
sec-a
q25
medium
asked
Apr 22, 2015
by
meena.p
1
answer
A change q is placed at the center of a cube of side l. What is the electric flux passing through each face of the cube ?
cbse
class12
physics
ch-1
sec-a
q24
medium
asked
Apr 22, 2015
by
meena.p
1
answer
Draw electrostatic field lines for a positive charge Q.
cbse
class12
physics
ch-1
sec-a
q23
easy
asked
Apr 22, 2015
by
meena.p
1
answer
The force on an electron kept in an electric field in a particular direction is F. What will be the magnitude and direction of the force experienced by a proton kept at the same point in the filed ? Mass of the proton is about $1836$ times the mass of the electron
cbse
class12
physics
ch-1
sec-a
q22
difficult
asked
Apr 22, 2015
by
meena.p
2
answers
A dipole moment P is kept in a uniform electric field E. Write the value of the angle between P and E for which the torque experienced by the dipole is (i) minimum (ii) maximum
cbse
class12
physics
ch-1
sec-a
q21
medium
asked
Apr 22, 2015
by
meena.p
1
answer
Can electrostatic potential at a point , be zero, while electric field at that point is not zero ?
cbse
class12
physics
ch-1
sec-a
q20
medium
asked
Apr 22, 2015
by
meena.p
1
answer
The electric field in a certain region of space is given by $E= \hat i +2 \hat j + 3\hat k Nc$. Calculate the electric flux over the area given by $S= 3 \hat i + 4 \hat j \;m^2$
cbse
class12
physics
ch-1
sec-a
q19
difficult
asked
Apr 22, 2015
by
meena.p
1
answer
The net inward flux through any closed surface is $8.0 \times 10^3Nm^2 c^{-1} $. Find the net charge inside the box .
cbse
class12
physics
ch-1
sec-a
q18
medium
asked
Apr 22, 2015
by
meena.p
1
answer
In which orientation , a dipole placed in a uniform electric field is in (i) stable (ii) unstable equilibrium ?
cbse
class12
physics
ch-1
sec-a
q17
medium
asked
Apr 22, 2015
by
meena.p
1
answer
Two dipoles , made from charge $\pm q$ and $\pm Q$ respectively , have equal dipole moments . give the (i) ratio between the seperation of these two pairs of charges. (ii) angle between the dipole axis of these two dipoles
cbse
class12
physics
ch-1
sec-a
q16
medium
asked
Apr 22, 2015
by
meena.p
1
answer
Two protons are brought nearer, What will be the effect on potential energy system ?
cbse
class12
physics
ch-1
sec-a
q15
medium
asked
Apr 21, 2015
by
meena.p
1
answer
A man in an insulated metallic cage does not receive a shock , even when the cage connected to a high voltage source. why ?
cbse
class12
physics
ch-1
sec-a
q14
medium
asked
Apr 21, 2015
by
meena.p
1
answer
What is the change on $Cu^{++}$
cbse
class12
physics
ch-1
sec-a
q13
medium
asked
Apr 21, 2015
by
meena.p
1
answer
The distance of the field point, on the equatorial place of a small electric dipole is halved . By what factor does the electric field due to the dipole charge ?
cbse
class12
physics
ch-1
sec-a
q12
medium
asked
Apr 21, 2015
by
meena.p
0
answers
The distance of the field point, on the equatorial place of a small electric dipole is halved . By what factor does the electric field due to the dipole charge ?
cbse
class12
physics
ch-1
sec-a
q12
medium
asked
Apr 21, 2015
by
meena.p
1
answer
A and B are two conducing spheres of the same radius, A being solid and B hollow. Both are changed to the same potential . What will be the relation between the changes on the two spheres ?
cbse
class12
physics
ch-1
sec-a
q11
medium
asked
Apr 21, 2015
by
meena.p
1
answer
An electrostatic field line cannot be discontinuous , why ?
cbse
class12
physics
ch-1
sec-a
q10
easy
asked
Apr 21, 2015
by
meena.p
1
answer
What is the angle between the direction of electric field at any (i) axial point and (ii) equatorial point. due to an electric dipole ?
cbse
class12
physics
ch-1
sec-a
q9
medium
asked
Apr 21, 2015
by
meena.p
1
answer
An electric dipole of dipole moment $20 \times 10^{-6}$ is enclosed by closed surface. what is the net flex coming out of this surface ?
cbse
class12
physics
ch-1
sec-a
q8
easy
asked
Apr 21, 2015
by
meena.p
1
answer
Consider the situation shown in the figure be what are the signs of $q_1$ and $q_2$ ?
cbse
class12
physics
ch-1
sec-a
q7
medium
asked
Apr 21, 2015
by
meena.p
1
answer
A point charge Q is placed at point O as shown in the fig. Is the potential difference $V_A - V_B $ positive ? negative or zero, if Q is (i) Positive (ii) negative
cbse
class12
physics
ch-1
sec-a
q6
medium
asked
Apr 21, 2015
by
meena.p
1
answer
Write the SI unit for electric dipole moment
cbse
class12
physics
ch-1
sec-a
q5
easy
asked
Apr 21, 2015
by
meena.p
1
answer
Write the S.I unit of electric field intensity
cbse
class12
physics
ch-1
sec-a
q4
easy
asked
Apr 21, 2015
by
meena.p
1
answer
Name the physical quantity whose $S.I$ unit is $JC^{-1}$. Is it a scalar or a vector quantity.
cbse
class12
physics
ch-1
sec-a
q3
easy
asked
Apr 21, 2015
by
meena.p
1
answer
The force acting between two print charges $q_1$ and $q_2$ kept at some distance apart in air is attractive or repulsive when (i) q_1q_2 > 0 (ii) q_1 q_2 <0$
cbse
class12
physics
ch-1
sec-a
q2
easy
asked
Apr 21, 2015
by
meena.p
1
answer
Define the term electric dipole moment . Is it a scalar or a vector quantity ?
cbse
class12
physics
ch-1
sec-a
q1
easy
asked
Apr 21, 2015
by
meena.p
1
answer
The value of $4 \sqrt {12} + 5 \sqrt {27} - 3 \sqrt {75}+300$ is ________
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
The simplified form of $3 \sqrt {2}+4 \sqrt {64} + \sqrt[4]{2500}+\sqrt [6] {8}$ is ___________
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
The simplified form of $\sqrt {294} -\sqrt {150} + 2 \sqrt 6 -3 \sqrt {\large\frac{1}{6}}$ is ________
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
The simplified value of $4 \sqrt {12} - \sqrt {50} - 7 \sqrt {48}$ is ________
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
Arrange in decreasing order of magnitude $\sqrt[4]{10},\sqrt [6]{6},\sqrt[8] {90}$
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
Arrange in decreasing order of magnitude $\sqrt[3]{4},\sqrt [4]{6},\sqrt[8] {90}$
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
If $ a = \large\frac{2 - \sqrt 5}{2+\sqrt 5},$$b = \large\frac{2+\sqrt 5}{2- \sqrt 5}$ then $a^2 -b^2 =$
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
The simplest rationalizing factor of $ \sqrt [3] {500}$ is
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
If $ \large\frac{\sqrt 3 -1}{\sqrt 3 +1}$$=a - b \sqrt 3$, then
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
If $ x= 7+4 \sqrt 3 $, and $xy =1$ then $ \large\frac{1}{x^2}+\frac{1}{y^2}$=______
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
If $x= \sqrt [3] {2+\sqrt 3}$, then $x^3 +\large\frac{1}{x^3}$=_____
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
If $ x = \large\frac{2}{3 +\sqrt{7}}$, then $(x-3)^2$=________
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
The ratiocination factor of $\sqrt 3$ is
olympiad
math
ch-1
realnumber
class9
asked
Feb 2, 2015
by
meena.p
1
answer
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