Recently Active Physics 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 ...

WARNING : NOT FOR JEE ASPIRANTS as of now I was reading about special relativity and got some doubts I wud be glad for someone to clear these DOUBT 1 : TIME DILATION it is derived t = t' / 1 - (v/c)2 taking a ray of light mov ...

Two steel balls freely drop onto an elastic plate, the first one from a height of \small \mathit{h}_{1} =44cm and the second from a height \small \mathit{h_{2}} =11cm but after time \small \tau measured from the instant the f ...

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 ...

A point source of light S is placed at a distance 10cm infront of the centre of a mirror of width 20cm suspended vertically on a wall.An insect walks with a speed 10cm/s infront of the mirror along a line parallel to the mirr ...

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 ...

Help fellow targetiitians , it seems that a great fellow like me cannot even solve this very naive question: A ball dropped from certain height makes an elastic collission with an inclined plane with angle of inclination = 45 ...

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 barometer kept in a stationary elevator reads h cm of Hg column. the air pressure in read barometer when it is accelerating down with an acceleration a is 1. dhg 2. d(g+a)h 3. d(g-a)h 4. NONE ...

*Image* find the time taken when A collides with B. ...

A cylindrical tube of volume 'V' with adiabatic walls containing an ideal gas.The internal energy of this ideal gas is given by 1.5nRT.The tube is divided into two equal part by a fixed diathermic wall.Initially, the pressure ...

what do you mean by dπ and pπ back bonding ...

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 ...

viscoscity of any liquid depends upon viscous force,area of cross-section A and velocity gradient of the liquid.deduce the relation of viscos course in terms of coefficient of viscoscity. ...

Q1. In a container of negligible mass 140 g of ice initially at -15°C is added to 200g of water that has a temperature of 40°C.If no heat is lost to the surroundings ,what is the final temperature of the system and masses o ...

A bullet of mass 10 g moving with a speed of 20m/s hits on a ice block of mass 990g kept on a frictionless floor and gets stuck on it.How much ice will melt if 50%of the lost K.E goes to ice?(Temp of ice block=0 degree celciu ...

I Am having a few simple problems.... 1)In a book dat i have been reading it is said -"Dipole moment of trans-dichloroethylene is zero while cis-dichloroethylene has a definite dipole moment"...WHY? 2) Is there any technique ...

I would jus like to request the mentors to upload a few more tests (especially on general organic chemistry) and also some course materials ...

calculate net capacitance of this .. *Image* A) 3C B) 2C C) C/2 D) 25C/3 ...

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 ...

all surfaces are frictionless. three cylinders are placed as shown in the diagram. find the least angle θ that prevents the arrangement from collapsing 1. tan-11/2 2.tan-11/2√3 3.tan-11/3√3 4.tan-11/4√3 *Image* this is ...

All pulleys weigh 1kg each. A,B,C are movable pulleys and D,E are fixed.All strings are light and inextensible.Which of the following statements are correct-- A.The tension in the string in 6.5 N B.accel. of A is g/3 downward ...

maine kaha there r a lot of tough problems on this site lets give u some \lim_{n\rightarrow infinity}(very)^{n} simple problems on mechanics ...

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 ...