Recently Active Electricity And Magnetism Questions

1. *Image* when the switch is closed, the number of times th current through the circuit is 0 in a second? a.5000/pi b.2500/pi c.its never 0 d.it is always 0 2. *Image* What is the P.D across PQ at the instant the switch is c ...

pls make eq. circuit and find the Ceq *Image* ...

1. A single capacitor of capacitance C is connected to a battery of voltage E. Then the battery is disconnected and the polarity of the battery is reversed, find work done by batt. 2. A soap bubble is given a charge -q. its r ...

a capacitor is connected to a battery. the force of attraction btn plates whn the separation is halved??? a remains same. b becoms 8 tims c bcms 4 times d bcms 2 tims ...

1. *Image* B=1T.slider PQ movs at constant speed of 1m/s.the current through the 1 ohm resistor is......a.1A b.0.5A c.1.5A d.2A 2. *Image* dB/dt=1T/s.the wire btwn P&Q are flexible and of length 11/7m.find the current flowing ...

Q1. Multiple answer correct: There exist an electric field in space given by the relation \vec{E} = E_{0}x^n\hat{i} . Consider an imaginary cube of side l , centred at (\frac{l}{2},\frac{l}{2},\frac{l}{2}) whose faces are par ...

1.plz explain, what is the electric flux through each surface in a cube when a point charge is kept at one corner of the cube. mag of charge is q. 2. *Image* each capacitor has capacitance C , find energy drawn from source An ...

1.plz explain, what is the electric flux through each surface in a cube when a point charge is kept at one corner of the cube. mag of charge is q. 2. *Image* each capacitor has capacitance C , find energy drawn from source An ...

prove that if the electric field in a region is uniform at all points then the net charge in the region is zero ...

when is the work done by the battery and when is the work done on it ?? i mean is it when we take charge from higher pot. to lower pot. or the other way out ?? please help .. ...

A particle of mass 0.195 g carries a charge of -2.50 X 10^- 8 C. The particle is given an initial horizontal velocity that is due north and has magnitude 4.00 X 10^ 4 m/s. What are the magni- tude and direction of the rninirn ...

electrically charged drops of Hg fall from an altitude h into a spherical metal vessel of radius R in upper part of which there is a small opening. Mass of each drop is 'm' and charge is q. what is number 'n' of the last drop ...

Consider this situation: A spherical shell of radius a is earthed. A concentric spherical shell of radius b surrounds it and is given a charge Q. Can this system be a capacitor? If yes then find its capacitance, if no then ex ...

Why electric lines of force ends or starts normally from the surface of a conductor??? ...

we know that the electric field of an infinite thick sheet is EF = surface charge density epsilon i have taken the gaussian surface as shown in the figure. It ends inside the thick sheet ( its embedded inside ). Alongside the ...

Subjective type: 64 drops of a liquid each of capicitance 1μF coalese, the capacitance of the new drop is________ ...

Q1. The electric field is given by the expression E=c/x3 where c is a constant. Find the potential at a point P as a function of x. i.e. find V(x) Q2. If there is a cavity in a conductor and no charge is placed in the cavity, ...

*Image* in this question y d 1V batteries r ruled out and also while calculating the current only one of 2V or 3V is considered? plz xplain,d diagonal resistance is 2 ohm ...

a strip of metal of resistance R, length l and width d, is kept in a uniform magnetic field B. it is connected to an external source of potential and a current i flows through it. find the potential difference between A and B ...

Q1.What are dielectrics??? Q2.What is meant by 'continuous charge distribution'?? ...

Q.Two small spheres each of mass 'm' kg are suspended and charge q coulomb are suspended from a point by insulating threads each of L metre length,but of negligible mass.If @ is the angle which each string makes with the vert ...

*Image* find the potential difference accross AB a.1V b.2V c.1.5V d.cant be determined ...

how does the drift velocity of electrons in a metallic conductor change if the length of the conductor is doubled by stretching it. PD is kept constant explain ...

A capacitor of capacitance C is charnged to a potential difference V from a cell and then disconnected. A charge +Q is now given to its +ve plate. The potential difference across the capacitor is now: (a) V (b) V+Q/C (c) V+Q/ ...

Why does the charge on a parallel plate capacitor appear on the facing surfaces only? ...

A and B are two metallic balls of radii 8 and 2cm respt.both are large distance apart .A is charged to 100nc and touches B and taken back and charged again to 100nc.this process is repeated completely till B reaches a steady ...

72. Two equal resistances each of 100 W ± 1% (standard deviation) are connected in parallel. The standard deviation of the parallel combination will be (1) 0.5 % (2) 12% (3) 2% (4) 2% ...

77. Adiabatic demagnetization of a substance (1) decrease the temperature (2) increase the temperature (3) increase the volume (4) decrease the volume ...

HEY GUYS..............CAN ANYBODY PLEASE GIVE SOME OF THE questions that were asked in bitsat-2009............(ofcourse those who have givn thier examination)..sso that we could get the difficulty level..............seriously ...

Sir could you advice ,how by just looking at the circuit can yous say that between any two points it will be parrallel or series ...