Recent questions in Physics

In half wave rectifier if the D.C component at output is $\large\frac{10}{\pi}$ $V$ What is the peak value of sinusoidal input signal.

asked Jan 31, 2014 by meena.p

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Transistor working as an amplifier operates in its active region of characteristic only when

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Electric potential is given by $\;V=2x^2\;$ Find the electric field at $\;(1 ,0 ,2)\;$ in Volt/metre.

asked Jan 31, 2014 by yamini.v

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In the circuit given below if the output $D=1$ the input must be

asked Jan 31, 2014 by meena.p

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which of the following represents the system of logic gates given below.

asked Jan 31, 2014 by meena.p

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If the 0 and 1 are inputs for a NAND gate what would be the output?

asked Jan 30, 2014 by meena.p

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The following circuit can be reduced to what type of a gate?

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If there are n capacitors in parallel connected to V volt source , then energy stored is equal to

asked Jan 30, 2014 by yamini.v

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The NOR gate can be represented by which venn diagram ?

asked Jan 30, 2014 by meena.p

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Which of the statement about NOT gate is true?

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A charge Q is placed at the corner of a cube electric flux through the cube is

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The following logic circuit has output

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If a charge is shifted from a low potential region to high potential region , the electric potential energy

asked Jan 30, 2014 by yamini.v

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An electric dipole of moment $\;\overrightarrow{P}\;$ is lying along a uniform electric field $\;\overrightarrow{E}\;$ The work done in relating the dipole by $\;90^{0}\;is$

asked Jan 30, 2014 by yamini.v

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Three NAND gates are connected as shown in circuit. The logic operation corresponds to

asked Jan 30, 2014 by meena.p

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Metallic sphere of radius R is charged to potential V . The charge q is proportional to

asked Jan 30, 2014 by yamini.v

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Distribution of charges is shown in figure . The flux of electric field due to these charges through the surface is

asked Jan 30, 2014 by yamini.v

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Given the following VI-Characteristic curve of a pn-junction diode, identify what is (A) and (B)?

asked Jan 30, 2014 by meena.p

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An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r . Find the coulomb force $\;\overrightarrow{F}\;$ between the two

asked Jan 30, 2014 by yamini.v

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The figure shows two capacitors of capacitance c and charged to same potential c connected in two circuits . What will be the charge on the capacitor after a time $t= cr$ from the start

asked Jan 30, 2014 by meena.p

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A $\;Q \;\mu C\;$ is placed at the centre of a cube. The flux coming from any surface will be

asked Jan 30, 2014 by yamini.v

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The output of the circuit across resistor R is

asked Jan 30, 2014 by meena.p

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Electric field and potential inside hollow charged conducting sphere are respectively

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If a charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium then the value of q is

asked Jan 30, 2014 by yamini.v

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On moving a charge of 100 coulombs by 10 cm , 5 J of work is done , then the potential difference between the points is

asked Jan 30, 2014 by yamini.v

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In a certain region V= $\;Axy+Bx^2+Cy\;$ where A , B , C are constants . Find electric field as a function of $\;(x ,y ,z)\;.$

asked Jan 30, 2014 by yamini.v

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Calculate the magnitude of an electric field which can just balance a deutron of mass $\;3.2\times10^{-27}\;kg$

asked Jan 30, 2014 by yamini.v

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Electric potential at a point P , due to a point charge q at A at distance r from P is V . Then if double of this charge is uniformly distributed on a hollow sphere of radius 2r centered at A then potential at P due to sphere is

asked Jan 30, 2014 by yamini.v

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729 drops of same size are charged to a potential of 1 V each . If they coalesce to form a single drop , its potential would be

asked Jan 30, 2014 by yamini.v

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The electric field in a region of space is $\;\overrightarrow{E}=5 \hat{i} +3 \hat {j}\;.$ The flux of $\;\overrightarrow{E}\;$ due to this field through an area $\;1 m^2\;$ lying in x - z plane is

asked Jan 30, 2014 by yamini.v

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Three identical charges $\;(q)\;$ are placed at corners of an equilateral triangle of side l . Find the work require to double the dimensions of traingle

asked Jan 30, 2014 by yamini.v

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Five point charges $\;(q\;each)\;$ are placed at five vertices of a regular hexagon of side 2a . What is the magnitude of net electric field at the centre of hexagon .

asked Jan 30, 2014 by yamini.v

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The circuit given below represents

asked Jan 30, 2014 by meena.p

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Charges 2 q and q are placed at $\;(a , 0)\;and\;(-a , 0)\;.$ The points where electric field is zero will lie in

asked Jan 30, 2014 by yamini.v

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In the circuit shown below two inputs A and B and output C is given. The circuit represents

asked Jan 30, 2014 by meena.p

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A proton is released from rest , 10 cm from a charged sheet carrying charge density of $\;-2.21\times10^{-9}\;c/m^2\;.$ It will strike the sheet after time $\;(approximately)$

asked Jan 30, 2014 by yamini.v

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Two point charges $\;q_{1}=3\times10^{-6}\;C\;$ and $\;q_{2}=5\times10^{-6}\;C\;$ are located at $\;(3 , 5 ,1)\;$ and $\;(1 , 3 , 2)\;m$ . Find the force on $\;q_{1}\;$ due to $\;q_{2}\;.$

asked Jan 30, 2014 by yamini.v

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Find the force on points of a triangle

asked Jan 30, 2014 by yamini.v

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Consider the situation of figure the work done in moving to particles from P to A is $\;W_{A}\;is\;W_{B}\;$ and $\;P\;to\;C\;W_{C}\;$ Find the correct relation .

asked Jan 30, 2014 by yamini.v

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The Output Y of the figure is :

asked Jan 30, 2014 by meena.p

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The figure represents

asked Jan 30, 2014 by meena.p

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The Boolean equation for the circuit is

asked Jan 30, 2014 by meena.p

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A ring of radius R is having charges $\; q \;and \; 3 q\;$ distributed on its two half parts . The electric potential at a point on the axis $\;\sqrt{3}\;R\;$ from its centre is

asked Jan 29, 2014 by yamini.v

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A proton , a deutron and alpha particle are accelerated through potentials of $\;V , 2V ,4V\;$ respectively . Their velocity will bear a ratio .

asked Jan 29, 2014 by yamini.v

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The electric field in a region is given by $\;\overrightarrow{E}=5 \hat{i} - 3 \hat {j}\;.$ Find $\;V_{B}-V_{A}\;.$ If A is origin & B is $\;(0,0,5)\;m$

asked Jan 29, 2014 by yamini.v

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An electric field $\;\overrightarrow{E}=(2 \hat{i}+3\hat{j})\;N/C$ exists in space . if the potential at the origin is zero , find the potential at $\;(2 ,2 )\;m$

asked Jan 29, 2014 by yamini.v

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Two charge particles are placed at 1 m apart what is the minimum possible magnitude of electric force acting on each charge

asked Jan 29, 2014 by yamini.v

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Equal charges q are placed at x=0,2,4,8 m on x axis . Find the $\;|force|\;$ experienced by the charge at x=2 m

asked Jan 29, 2014 by yamini.v

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Two point charges $\;q_{1}\;and\;q_{2}\;$ are placed on $\;x=-a\;and\;x=+a\;respectively\;.$ Find the relation between $\;q_{1}\;and\;q_{2}\;$ so that the net electric field at $\;x=+\large\frac{a}{2}\;$ is zero

asked Jan 29, 2014 by yamini.v

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Find the direction of electric field at point P for the charge distribution as shown in figure

asked Jan 29, 2014 by yamini.v

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