Recently Active Electricity And Magnetism Questions

Four identical charges Q are fixed at the four coeners of a square of side a. Find the electric field at point P located symmetrically at a distance a / √2 from the centre of the square. ...

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting spherical shell. Let the potential between the surface of the solid sphere and that of the outer surfacel be V.If the shell is no ...

if a charged particle goes unaccelerated in a region containing electric n magnetic fields, a > E must be perpendicular to B b > v must be perpendicular to E c > v must be perpendicular to B] d > e must be equal t ...

*Image* Ques1) In the figure shown above, a thin glass rod forms a semicircle of radius r = 5m. Charge is ubiformly distributed along the rod with +q in the upper half and -q in the lower half. What are the amg and direction ...

Ques1) *Image* The figure shows a meter brdge circuit, with AB = 100 cm, X =12 cm and R =18 ohms, and the jockey is in the posn of balance.If R is now 8 ohm, through what distance will J have to be moved to obtain balance. (a ...

The wire of the potentiometer has resistance 4 ohm and length 1m. It is connected to a cell of emf 2V and internal resistance 1 ohm. If the cell of emf 1.2 V is balanced by it, show that the balancing length will be 75 cm. ...

If the length of the filament of the heater is reduced by 10 %, the power of the heater will (a)inc by abt 9 % (b) inc by abt 11 % (c) inc abt 19 % (d) dec abt by 10 % ...

1) A tap supplies water at 22°C . A man takes 1 litre per minute at 37°C from the geyser. Show that the power of the geyser is 1050W. 2) A servo stabilizer restricts voltage output to 220V±1 %. If an electric bulb 100W / 2 ...

The switch is closed at t=0. calculate p.d. across inductor 'ab' as a function of time. *Image* ...

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A Ring of radius 'r' and has a charge of 'q' distributed uniformly over it's length . a small portion 'x' is cut of from the ring where x<<r . Find the Electric field due to the remaining portion at the center of the ri ...

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Ques1) What is required in order to maintain a steady current in a conductor? Ques2) What would happen to the drift velocity of the electrons in a wire and to the current in the wire if the electrons could move freely without ...

*Image* in a uniform sphere of charge density P ,a small cavity is created.the center of the cavity is at a distance "a" from the center of the sphere. taking center of the sphere as origin and a^ as a unit vector along the l ...

True /false When a body is coonencted to earth all the charge flows to eart and it becomes electrically neutral.. ans is true.. but all the charge doesnt necesarily flow acc to me.. am i rite or wrong...tell me... ...

a straight line wire carrying current in negative z-axis .what is unit vector in yhe direction of magnetic field at the point P(1,2,3) ...

*Image* Ques1) In the above figure, an a meter bridge , two resistances in the gap are 5 ohms and 10 ohms. The wire resistance is 10 ohms. The emf of the cell connected at the neds of the wire is 5 volts and it's internal res ...

when two resistors of resistance R1 and R2 are connected in parallel,the net resistance is 3ohm.When connected in series,it's value is 16ohm. calculate the values of R1 and R2. ...

Potential diffrence in EMF(electromotive force) or Terminal voltage is more?????????????????????? ...

A Ring of radius 'r' and has a charge of 'q' distributed uniformly over it's length . a small portion 'x' is cut of from the ring where x<<r . Find the Electric field due to the remaining portion at the center of the ri ...

A Ring of radius 'r' and has a charge of 'q' distributed uniformly over it's length . a small portion 'x' is cut of from the ring where x<<r . Find the Electric field due to the remaining portion at the center of the ri ...

A wire is stretched to increase it's length by 10%.Find the percentage change in it's resistance..............................plz solve this sum for me. ...

*Image* Ques1) The above figure shows an arrangement to measure the emf and internal resistance of the battery. Suppose the voltmeter reads 1.52 v when the switch S is open. When the switch is closed the voltmeter reading dro ...

*Image* In the circuit shown the battery is ideal, with emf V. The capacitor is initially uncharged. The switch S is closed at time t=0. We have to calculate the charge Q on the capapcitor at time t. From my point of view, th ...

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2 capacitors with capacitance C1 & C2 are connected with a battery in same circuit, 1st in parallel, then in series... C1≠C2 Current circulates in the circuit & this circuit is left for sufficiently long time.....Now answer ...

An invertor operates at a Voltage of max 12 V, so how can it run the fans and other appliances which function at no-less than 220V....(Domestic house supply)? [99] ...

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GIVE A EXAMPLE OF A CASE IN WHICH MAGNETIC LINES OF FORCE EXIST WITHOUT POLARITY ????????? ...

A metallic spherical shell of radius r1 is surrounded by another concentric metallic spherical shell of radius r2.The space between the two shells is filled with dielectric of dielectric constant K.If a charge Q is given to t ...