Physics-
General
Easy
Question
A bar magnet of magnetic moment M is bent in ‘ υ ’ shape such that all the parts are of equal lengths. Then new magnetic moment is
- M/3
- 2M
M
M
M
M
The correct answer is: M/3
Related Questions to study
physics-
Five identical resistances are connected in a network as shown. The resistance measured between A and B is 1
. Each resistance is
Five identical resistances are connected in a network as shown. The resistance measured between A and B is 1. Each resistance is
physics-General
physics-
The effective resistance of the network between points A and B
The effective resistance of the network between points A and B
physics-General
physics-
An elliptical cavity is carved within a perfect conductor. A positive charge q is placed at the centre of the cavity. The points A and B are on the cavity surface as shown in the figure. Then
An elliptical cavity is carved within a perfect conductor. A positive charge q is placed at the centre of the cavity. The points A and B are on the cavity surface as shown in the figure. Then
physics-General
physics-
A uniform rod of length l and mass m is charged with a charge q is hanging from one of its ends as shown in figure. At 
a horizontal electric field E is switched on in the horizontal direction perpendicular to the rod. Find the minimum value of E so that the rod rotates upto horizontal level.
A uniform rod of length l and mass m is charged with a charge q is hanging from one of its ends as shown in figure. At a horizontal electric field E is switched on in the horizontal direction perpendicular to the rod. Find the minimum value of E so that the rod rotates upto horizontal level.
physics-General
physics-
The resultant magnetic moment for the following arrangement (non coplanar vectors)
The resultant magnetic moment for the following arrangement (non coplanar vectors)
physics-General
physics-
Two thin different dielectrics are inserted between a parallel plate capacitor. Then electric field separation graph is 
Two thin different dielectrics are inserted between a parallel plate capacitor. Then electric field separation graph is
physics-General
physics-
Charge q is distributed uniformly on an arc of radius R subtending an angle 
at its centre. Another charge –q is placed at the centre of the arc. The electric dipole moment of the system is
Charge q is distributed uniformly on an arc of radius R subtending an angle at its centre. Another charge –q is placed at the centre of the arc. The electric dipole moment of the system is
physics-General
physics-
The variation of electric field between the two charges 
and 
along the line joining the charges is plotted against distance from q1 (taking rightward direction of electric field as positive) as shown in the figure. Then the correct statement is
The variation of electric field between the two charges and along the line joining the charges is plotted against distance from q1 (taking rightward direction of electric field as positive) as shown in the figure. Then the correct statement is
physics-General
physics-
A, B, C, D corners of a square are occupied by 
and 
charges respectively. The side of square is 2a. The field at the mid point of side CD is zero. What is the value of 
?
A, B, C, D corners of a square are occupied by and charges respectively. The side of square is 2a. The field at the mid point of side CD is zero. What is the value of ?
physics-General
physics-
In the circuit shown, a potential difference of 60 V is applied across AB. The potential difference between the points M and N is
In the circuit shown, a potential difference of 60 V is applied across AB. The potential difference between the points M and N is
physics-General
physics-
One plate of a capacitor having charge Q, and plate area A, is pulled by a man keeping one plate at fix position, as shown in figure. What force should be applied by the man such that, plate moves with constant velocity
One plate of a capacitor having charge Q, and plate area A, is pulled by a man keeping one plate at fix position, as shown in figure. What force should be applied by the man such that, plate moves with constant velocity
physics-General
physics-
Three charges
and are placed as shown. S is a spherical Gaussian surface. Electric field at any point on S is
Three charges and are placed as shown. S is a spherical Gaussian surface. Electric field at any point on S is
physics-General
physics-
Three positive and three negative charges of equal magnitude are placed at the corners of a regular hexagon PQRSTU. If electric field at O due to all the charges is twice the field at O due to a positive charge at R only, the order in which the changes are placed at PQRSTU is
Three positive and three negative charges of equal magnitude are placed at the corners of a regular hexagon PQRSTU. If electric field at O due to all the charges is twice the field at O due to a positive charge at R only, the order in which the changes are placed at PQRSTU is
physics-General
physics-
Four plates of area A are arranged as shown. The equivalent capacitance between A and B is
Four plates of area A are arranged as shown. The equivalent capacitance between A and B is
physics-General
physics-
Three point charges q, q, –2q are placed on an equilateral triangle of side a. The magnitude of dipole moment of the arrangement is
Three point charges q, q, –2q are placed on an equilateral triangle of side a. The magnitude of dipole moment of the arrangement is
physics-General
