Recent questions in Math

If A is a square matrix such that $|A|=5$ write the value of $|AA^T|$

asked May 27, 2016 by meena.p

1 answer

Find the distance between the planes $\overrightarrow {r}.(2 \hat i - 3 \hat j +6 \hat k)-4=0$ and $\overrightarrow {r} . (6 \hat i - 9 \hat j +18 k )+30=0$

asked May 27, 2016 by meena.p

1 answer

If $\overrightarrow {a}$ and $\overrightarrow {b}$ are unit vectors , then what is the angle between $\overrightarrow {a}$ and $\overrightarrow {b}$ for $\overrightarrow {a} - \sqrt 2 \overrightarrow {b}$ to be a unit vector ?

asked May 27, 2016 by meena.p

1 answer

If vectors $\overrightarrow {a}$ and $\overrightarrow {b}$ are such that $|\overrightarrow {a}| = \large\frac{1}{2}$ , $|\overrightarrow {b}| = \large\frac{4}{\sqrt 3}$ and $|\overrightarrow {a} \times \overrightarrow {b}| = \large\frac{1}{\sqrt 3}$ then find $|\overrightarrow {a}. \overrightarrow {b}|$

asked May 27, 2016 by meena.p

1 answer

application of derivatives

asked Mar 4, 2016 by _1

0 answers

When a non-volatile solute is dissolved in a solvent the relative lowering in vapour pressure is equal to

asked Sep 10, 2015 by meena.p

1 answer

What is the $SI$ unit of pole strength ?

asked Jul 20, 2015 by meena.p

1 answer

A short magnet has a magnetic moments of $0.48\;J/T$ . give the direction and magnitude of the magnetic field produced by the magnet of a distance of $10\; cm$ from the center of the magnet on the axis

asked Jul 13, 2015 by meena.p

1 answer

$V-I$ graph for a metallic wire at two different temperatures $T_1$ and $T_2$ are shown in the figure. Which of the two temperature is higher and why ?

asked Jun 29, 2015 by meena.p

1 answer

What are the dimensions of electrical conductivity ?

asked Jun 29, 2015 by meena.p

1 answer

a)Three resistor $2 \Omega,4 \Omega$ and $5\;\Omega$ are combined in parallel. What is the total resistance of the combination ? b) If the combination is connected to a battery emf $20\;V$ and negligible internal resistance determine the current through each resistor, and the total current drawn from the battery

asked Jun 29, 2015 by meena.p

1 answer

What conclusion can you draw from the following observation on a resistor made of allong magnanin ?Choose the correct alternative?

asked Jun 29, 2015 by meena.p

1 answer

Given the resistance of $1 \Omega, 2 \Omega,3 \Omega$ how will you combine thus to get , an equivalent resistance of $(i) \large\frac{11}{3}$ $\Omega \qquad (ii) \large\frac{6}{11}$ $\Omega \qquad (iii) \large\frac{11}{5}$ $\Omega \qquad (iv) 6 \Omega?$

asked Jun 29, 2015 by meena.p

1 answer

A steady current flows in a metallic conductor of non- uniform cross section. Which of these quantities is constant along the conductor ?

asked Jun 29, 2015 by meena.p

1 answer

Demonstrate using numerical methods

asked Jun 25, 2015 by hectordavid1995

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An arbitrary surface enclosed a dipole . what is the electric flux through this surface ?

asked Apr 29, 2015 by meena.p

0 answers

A hollow charged conductor has a tiny hole cut into its surface . show that the electric field in the hole is $\bigg( \large\frac{\sigma}{2 \in_0}\bigg)$ $\hat n$ , where $\hat n$ is the unit vector in the outward normal direction and $\sigma$ is the surface change density near the hole.

asked Apr 28, 2015 by meena.p

1 answer

A conductor A with a cavity as shown in the fig(a) is given a charge Q. Show that the entire charge must appear on the outer surface of the conductor .

asked Apr 28, 2015 by meena.p

1 answer

As oil drop of 12 excess electron is held stationary under a constant electric field of $2.55 \times 10^4 \;N/C$ in Millikan's oil drop experiment . The density of the oil is $1.26\;g/cm^3$ Estimate the radius of the drop . $(g = 9.8 \;m/s^2; e = 1.60 \times 10^{-91}\;C)$

asked Apr 28, 2015 by meena.p

1 answer

Two point charges $+9e$ and $e$ are seperated by 412\;cm4 in air. determine the position of the point at which the resultant electric is zero.

asked Apr 28, 2015 by meena.p

1 answer

A conductor with a cavity in it is given a charge Q. What will be the total charge on the surface of this conductor if another carrying charge q is placed in the cavity without touching the cavity ?

asked Apr 28, 2015 by meena.p

1 answer

The electric field component in the following figure are $Ex = \alpha x^{1/2}, E_y =0, E_z=0$ in which $\alpha =800 NCm6{-1/2}$ Calculate the charge within the cube. Assume $a= 0.1\;m$

asked Apr 28, 2015 by meena.p

1 answer

The electric field component in the following figure are $Ex = \alpha x^{1/2}, E_y =0, E_z=0$ in which $\alpha =800 NCm6{-1/2}$ Calculate the flux $\phi _2$ through the cube

asked Apr 28, 2015 by meena.p

1 answer

Two points charges $q_1$ anb $q_2$ are located at points $(a,0,0)$ and $(0,b,0)$ respectively . Find the electric field bue to these charges at the point $(0,0,0)$

asked Apr 28, 2015 by meena.p

1 answer

Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $17.0 \times 10^{-22}C/m^2$ what is E? between the plates ?

asked Apr 28, 2015 by meena.p

1 answer

Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $17.0 \times 10^{-22}C/m^2$ what is E? In the outer region of the second plate ?

asked Apr 28, 2015 by meena.p

1 answer

Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $17.0 \times 10^{-22}C/m^2$ what is E? In the outer region of the first plate ?

asked Apr 28, 2015 by meena.p

1 answer

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

asked Apr 28, 2015 by meena.p

1 answer

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

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