physics Question Bank - Sarthaks eConnect

`H^+, He^+` and `O^(++)` are project in uniform transverse magnetic field with equal acceleration potential, then ratio of their radii are respectively if their masses are 1 a.m.u, 4 a.m.u and 16 a.m.u respectively:

Consider the four circuits shown in the figure given below. In which circuit the power dissipated is the greatest? (Neglect the internal resistance of the power supply)

A point charge q is situated at a distance d from one end of a thin non- conducting rod of length L having a charge Q (uniformly distributed along its length) as shown in figure. Then the magnitude of electric force between them is:

Three chargers `q_1=1muc , q_2= 2muc` and `q_3=-3muc` and four surfaces `S_1, S_2, S_3 and S_4` are shown in figure. The flux emerging through surface `S_2` in N-`m^2`/C is-

Which of the following quantities does not depend upon the orbital radius of the satellite.

Wheat stone bridge is balanced. Find ratio of electric power dissipated in (P+Q) to (R+S):

A rise of temperature of `4^oC` is observed in a conductor by passing a current. If the current is tripled, the rise temperature will be:

A and B are two identical spheres charge on them is `7muC` and `1muC` respectively. Now both are connected by a wire. Calculate flow of charge from A to B

If the radius of the earth were shrink by 1% and its mass remaining the same, the acceleration due to gravity on the earths surface would:

A tunnel is dug along a diameter of the earth. If `M_e & R_e` are the mass & radius of the earth respectively. Then the force on a particle of mass m placed in the tunnel at a distance r from the center is:

A hot black body emits the energy at the rate of `16 J m^-2 s^-1` and its most intense radiation corresponds to 20,000 `overset{o}{A}`. when the temperature of this body is further increased and its most intense radiation corresponds to 10,000 `overset{o}{A}`, then the energy radiated in `Jm^-2 s^-1` will be:

A building has two overhead water tanks, each fitted with a sensor `(S_1, S_2)` which goes to 0 when the water level in the tank falls below a set value and remains 1 otherwise. A common pump is used to raise water from an underground storage tank to these overhead tanks. Of the following circuits, which one will turn on (P=1) the pump only when at least one of the tanks have water level below the set value?

In a cyclic process, a gas is taken from state A to B via path-I as shown in the indicator diagram and taken back to state A from state B via path-II. In the complete cycle:

A particle of mass M is at a distance a from surface of a thin spherical shell of uniform equal mass and having radius a

Which of the following is CORRECT

A standing wave pattern is formed on a string. One of the waves is given by equation `y_1=a cos (omegat-kx+pi/3)` then the equation of the other wave such that at x=0 a node is formed.

In the given figure for `u=u_0/3` find the height from the ground at which the block leaves the hemisphere.[where ` u_0=sqrt((gr)/3)` ]

The centre of mass of a non uniform rod of length L whose mass per unit length `lambda` varies as `lambda =(k.X^3)/L` where K is a constant & `X` is the distance of any point on rod from its one end, is at distance (from the same end)

A block of mass m start at rest at height h on a frictionless inclined plane. The block slides down to plane, travels across a rough horizontal surface with coefficient of kinetic friction and compresses a spring with force constant k a distance x before momentarily coming to rest. Then the spring extends and the block travels back across the rough surface, sliding up the plane. The block travels a total distance d on rough horizontal surface. The correct expression for the maximum height h that the block reaches on its return is:

A particle is describing circular motion in a horizontal plane in contact with the smooth inside surface of a fixed right circular cone with its axis vertical and vertex down. The height of the plane of motion above the vertex is h and the semivertical angle of the cone is `alpha`. The period of revolution of the particle:

Recent questions and answers in physics