Physics-
General
Easy
Question
A thin metallic spherical shell carries a charge Q on it. A point charge q is placed at the centre of the shell and another charge q1 is placed outside it as shown in fig. All the three charges are positive. q1 q Q The force on the charge at the centre is
- towards left
- towards right
- upward
- zero
The correct answer is: zero
Related Questions to study
physics-
A simple pendulum of time period T is suspended above a large horizontal metal sheet with uniformly distributed positive charge. If the bob is given some negative charge, its time period of oscillation will be
A simple pendulum of time period T is suspended above a large horizontal metal sheet with uniformly distributed positive charge. If the bob is given some negative charge, its time period of oscillation will be
physics-General
physics-
A positive point charge Q is brought near an isolated metal cube. Which of the following is correct?
A positive point charge Q is brought near an isolated metal cube. Which of the following is correct?
physics-General
physics-
Three charges –q1 + q2 and –q3 are placed as shown in figure. The x-component of the force on –q1 is proportional to
Three charges –q1 + q2 and –q3 are placed as shown in figure. The x-component of the force on –q1 is proportional to
physics-General
physics-
Three charges are placed at the vertices of an equilateral triangle of side 'a' as shown in fig. The force experienced by the charge placed at the vertex A in a direction normal to BC is :
Three charges are placed at the vertices of an equilateral triangle of side 'a' as shown in fig. The force experienced by the charge placed at the vertex A in a direction normal to BC is :
physics-General
physics-
In the basic CsCl crystal structure, 
and 
ions are arranged in a bcc configuration as shown in fig. The net electrostatic force exerted by the eight ions on the ion is :
In the basic CsCl crystal structure, and ions are arranged in a bcc configuration as shown in fig. The net electrostatic force exerted by the eight ions on the ion is :
physics-General
physics-
Fig. Show two coils A and B placed parallel to each other at a very small distance. Coil A is connected to an A.C.. supply. G. is very sensitive galvanometer. When the key is closed :
Fig. Show two coils A and B placed parallel to each other at a very small distance. Coil A is connected to an A.C.. supply. G. is very sensitive galvanometer. When the key is closed :
physics-General
physics-
A rectangular coil ABCD is rotated anticlockwise with a uniform angular velocity about the axis shown in fig : the axis of rotation of the coil as well as the magnetic field B are horizontal. The induced e.m.f. in the coil would be maximum when :
A rectangular coil ABCD is rotated anticlockwise with a uniform angular velocity about the axis shown in fig : the axis of rotation of the coil as well as the magnetic field B are horizontal. The induced e.m.f. in the coil would be maximum when :
physics-General
physics-
A conductor rod AB moves parallel to X-axis in a uniform magnetic field, pointing in the positive X-direction. The end A of the rod gets.
A conductor rod AB moves parallel to X-axis in a uniform magnetic field, pointing in the positive X-direction. The end A of the rod gets.
physics-General
physics-
A conducting square loop of side L and resistance R moves in a plane with a uniform velocity v. perpendicular to one of its side. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere. The current induced in the loop is :
A conducting square loop of side L and resistance R moves in a plane with a uniform velocity v. perpendicular to one of its side. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere. The current induced in the loop is :
physics-General
physics-
In the circuit of fig. the bulb will become suddenly bright if :
In the circuit of fig. the bulb will become suddenly bright if :
physics-General
physics-
Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is :
Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is :
physics-General
physics-
A square frame ABCD of side a and a long current carrying conductor PQ are arranged as shown in fig. If the frame moves towards right with a velocity u , the resultant induced e.m.f. in the loop will be
A square frame ABCD of side a and a long current carrying conductor PQ are arranged as shown in fig. If the frame moves towards right with a velocity u , the resultant induced e.m.f. in the loop will be
physics-General
physics-
The magnet in fig. rotates as shown on a pivot through its centre. At the instant Fig. shown, what is the directions of the induced currents ? (in wood)
The magnet in fig. rotates as shown on a pivot through its centre. At the instant Fig. shown, what is the directions of the induced currents ? (in wood)
physics-General
physics-
There are two coils A and B as shown in fig. What is the direction of the momentary current induced in coil B, when switch S is pressed
There are two coils A and B as shown in fig. What is the direction of the momentary current induced in coil B, when switch S is pressed
physics-General
physics-
The network shown in fig. is a part of a complex network. When current is 5 A and is decreasing at the rate of 103A/s, then VB-VA will be :
The network shown in fig. is a part of a complex network. When current is 5 A and is decreasing at the rate of 103A/s, then VB-VA will be :
physics-General
