Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small as compared to the mass of the earth. Then,
If the K.E. of a body is increased by $300\%$, its momentum will increase by:
The magnetic susceptibility is negative for:
The time period of a geostationary satellite is $24 \text{ hr}$ at a height $6R_E$ ($R_E$ is the radius of the Earth) from the surface of the earth. The time period of another satellite whose height is $2.5R_E$ from the surface will be:
Fertilisation in humans is practically feasible only if?
In the given V-T diagram, what is the relation between pressure $P_1$ and $P_2$?
The following figures show the arrangement of bar magnets in different configurations. Each magnet has a magnetic dipole moment $\mathbf{m}$. Which configuration has the highest net magnetic dipole moment?
An iron rod of susceptibility $599$ is subjected to a magnetizing field of $1200 \text{ A m}^{-1}$. The permeability of the material of the rod is: $(\mu_0 = 4\pi \times 10^{-7} \text{ T m A}^{-1})$
The dependence of acceleration due to gravity g on the distance r from the centre of the earth assumed to be a sphere of radius R of uniform density is as shown in the figure below:
A 250-turn rectangular coil with a length of $2.1 \text{ cm}$ and a width of $1.25 \text{ cm}$ carries a current of $85 \text{ }\mu\text{A}$ and is subjected to a magnetic field of strength $0.85 \text{ T}$. What is the work done to rotate the coil by $180^\circ$ against the torque?
Starting from the centre of the earth, having radius R, the variation of g (acceleration due to gravity) is shown by:
The unit of Stefan's constant σ is:
A short bar magnet of magnetic moment $0.4 \text{ J T}^{-1}$ is placed in a uniform magnetic field of $0.16 \text{ T}$. The magnet is in stable equilibrium when the potential energy is:
The following figures show the arrangement of bar magnets in different configurations. Each magnet has a magnetic dipole moment. Which configuration has the highest net magnetic dipole moment?
The $x$ and $y$ coordinates of the particle at any time are $x = 5t - 2t^2$ and $y = 10t$ respectively, where $x$ and $y$ are in metres and $t$ is in seconds. The acceleration of the particle at $t = 2$ s is:
A bar magnet of length L and magnetic dipole moment M is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be:
One mole of an ideal monatomic gas undergoes a process described by the equation $PV^3 = \text{constant}$. The heat capacity of the gas during this process is:
The volume occupied by the molecules contained in $4.5 \text{ kg}$ water at STP, if the molecular forces vanish away, is:
Match the items given in Column-I with those in Column-II and select the correct option given below: Column I (a) Cristae (b) Cisternae (c) Thylakoids Column II (i) Flat membranous sacs in stroma (ii) Infoldings in mitochondria (iii) Disc-shaped sacs in Golgi apparatus
An organic compound A ($\text{C}_4\text{H}_9\text{Cl}$) in reaction with $\text{Na}$/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. A is: