Recently Active Physics Questions

when a +ive pt charge is placed near a un charged conducting ball which was hung by a conducting thread a non conducting thread ...

why electrostatic experiments not work well in humid days. how can insulator get charged? ...

wat will happen when a glass rod rubbed with a silk and placed near a ideal insulated sphere a non ideal insulated sphere a conducting sphere please explain with diag.pleaseeeeeeeeeeeee ...

suppose you put 100 pennies in cup , shake the cup , and then toss the pennies onto floor (A)how many different head-tail arrangement(microstate) are possible for the 100 pennies ? what is the probability of finding exact ...

On heating a liquid of coefficient of cubical expansion γ in a container having coeff of linear exp γ/3 ,then what will happen to level of liquid in container? ...

*Image* two cylinders having radii R1andR2respectivelyand rotational inertias I1and I2respectiveely are supported by axes perpendicular to the plane.The large cylinder is initilally rotating with angular velocity ω0The small ...

Two unequal masses of 1 kg and 2 kg are connected by a string going over a clamped light smooth pulley. The system is released from rest. The larger mass is syopped for a moment 1 sec after the system is set in motion. Find t ...

A barometer having metallic scale reads height Hθ at temp θ°C.If the scale is callibrated at temp 0°C and α is coeff of linear exp and γ is coeff of cubical exp. then calculate value of correct height. ...

from a circular disc of radius R & mass 9m a small disc of radius R/3 is removed whose centre is at 2R/3 . find the moment of inertia of remainning disc about an axis perpendicular to the plane of disc & passing through centr ...

a body of moment of inertia I is rotated with angular velocity ω & then its kept on rough horizontal surface. find the expression for time in which it starts rolling. ...

In photoelectric effect experiment, is the photo current independent of frequency of incident light? [7] ...

If length of cylinder on heating inc. 2%,then are of base will increase ___% ...

A solid ball made of coefff of volume expansion 8 *10-6 /°C is immersed in a liquid having coeff of vol expansion 3 * 10-6 /°C.Calculate % increase in upthrust when temp increased by 100 °C ...

20g of boiling water is pooured into a cold brass vessel(specific heat =0.1 cal/g C) of mass 100g.Calculate final temp....... ...

A 10kg iron bar(specific heat 0.11cal/g°C) at 80°C is placed on ice block.How much ice melts? ...

A block of ice is floating in water with a piece of iron trapped in it. What will happen to the water level as the ice melts? ...

what will happen to a person sitting in a stationary car if lightning strikes the car... ...

why is bohr orbit non radiating ? even in this case shudnt there be em radiation ...

Q: A hydrogen gas filled balloon, attached with a certain weight, floats inside a water tank such that its top is just inside the surface of water. What will happen to it if it is submerged a certain distance below the surfac ...

two particles of mass m and 2m are connected by rigid rod(mass≈0) and slide with μ=0 on circular path. of radius r inside of vertical circular ring.If system released at rest at θ=0°. Determine 1)velocity v of pa ...

q1. ) simple:) *Image* Bn = Bn-1/2 mass m , charge q, etc etc... take nething missing.. >>if nth radius is 64 times the first radius,,, find n. n ε natural no.s ...

Q1. prove that when ice will melt, the water level will not increase. Q2. Which one is heavier in air - 1kg cotton or 1kg iron? Q3. A boat with scrap iron in it is floatng in a lake. If the iron is thrown in the lake, wha ...

in the two cases shown if we are asked energy of the first one we would answer 1/2mv2 for the other case we would answer 1/2I(v2/R2) where I is moment of inertia about O and v is velocity . A is any point on the sphere in fir ...

A chain of length l is placed on a smooth spherical surface of radius R. with one of its ends fixed at the top of the sphere.What will be the acceleration ω of each element of the chain when its upper end is released?It ...

Q: A hydrogen gas filled balloon, attached with a certain weight, floats inside a water tank such that its top is just inside the surface of water. What will happen to it if it is submerged a certain distance below the surfac ...

GIVEN STATEMENT: Mercury has a tendency to get depressed in the glass tube. The atmospheric pressure would try to raise it from the depressed level. HOW?? AND WHY?? ...

What is beat frequency plz explain with example ...

The equation of an elliptical orbit of a satellite of mass 2000 kg revolving around the earth is r=(8 X 106)/(1+0.5 cos θ). Mass of the earth = 5.97X1024kg. Find. 1. Eccentricity of orbit of satellite 2. Angular mome ...

A small disc A is placed on an inclined plane forming an angle α with the horizontal and is imparted an initial velocity v0.Find how the velocity of the disc depends on the angle φ if the friction coefficient k=tanα. a ...

two blocks A and B of mass M and 2M are connected by a string of length 3L. The block B is released from the position shown. When the string is just taut, the velocities of blocks and impulse tension in the string will be  ...