List of top Physics Questions

If $E_o$ be the electric-field intensity due to a short dipole at a point on the axis and $E_r$, be that on the perpendicular bisector at the same distance from the dipole then

If the energy of a 100 $\mu$F capacitor charged to 6 kV could all be used to lift a 50 kg mass, what would be the greatest vertical height through which mass could be raised?

In a regular polygon of $n$ sides, each corner is at a distance $r$ from the centre. Identical charges are placed at $(n - 1)$ corners. At the centre, the magnitude of intensity is $E$ and the potential is $V$. The ratio $V/E$ is

In the question number $18$, the potential at a point $20\, cm$ from the mid-point of the line joining the two charges in a plane normal to the line and passing through the mid-point is

the charge on capacitors $C_{1}$ and $C_{4}$ are

Introduction of a slab of which of the following will decrease the capacitance of a capacitor ?

The torque and magnetic potential energy of a magnetic dipole in most stable position in a uniform magnetic field $\left(\vec{B}\right)$ having magnetic moment $\left(\vec{m}\right)$ will be

The work done to move a unit charge along an equipotential surface from $P$ to $Q$

There is a uniform electric field of strength $10^3 V/m$ along y-axis; A body of mass 1 g and change $10^6$ C is projected into the field from origin along the positive x-axis with a velocity 10 m/s. Its speed in m/s after 10s is .(neglect gravitation)

Two charges of $2\mu C$ and $5\,\mu C$ are placed 2.5 cm apart. The ratio of the Coulombs force experienced by them is

Two tiny spheres carrying charges $1.8 \, \mu C$ and $2.8 \, \mu C$ are located at $40\, cm$ apart. The potential at the mid-point of the line joining the two charges is

Van de Graaff generator is used to

What happens when charge is placed on a soap bubble ?

What is the angle between electric field and equipotential surface?

What is the area of the plates of a 3F parallel plate capacitor, if the separation between the plates is 5 mm ?

Which among the following is an example of polar molecule?

Which of the following statements is true about the relation between electric field and potential?

Which of the following statements is/are true about the principle of Van de Graaff generator?

The potential due to dipole at a point is proportional to:

The charge deposited on $4\, \mu F$ capacitor in the circuit is

There is $10$ units of charge at the centre of circle of radius $1\, m$. The work done in moving $1$ unit of charge once around the circle is :

The force of interaction between two charges $q_{1}=6\, \mu C$ and $q_{2}=2\, \mu C$ is $12\, N$. If charge $q=-2\, \mu C$ is added to each of the charges, then the new force of interaction is

A charge of $10^{-9} C$ is placed on each of the $64$ identical drops of radius $2\, cm$. They are then combined to form a bigger drop. Its potential will be

An electric dipole has the magnitude of its charge as $q$ and its dipole moment is $p$. It is placed in a uniform electric field $E$. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively