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Four like charges each of +q are placed at the corners of a square of side a. The electric field intensity at the centre of square will be:

Consider unit positive charge at the centre of square. The electric field intensities at opposite sides of square are equal in magnitude and in... View Article

An electric dipole consists of a positive and negative charge of 4 μC. Each placed at a distance of 5 mm. The dipole moment for the system is

Given: q = 4 μC = 4 × 10-6 d = 5 mm = 5 ×10-3 The dipole moment = charge x separation distance between them p = q × d = 4 × 10-6 × 5 ×10-3 p = 2... View Article

Ratio of the permittivity of medium to the permittivity of free space is known as

Ratio of the permittivity of medium to the permittivity of free space is known as Dielectric constant.... View Article

SI unit electric field and electric force are

electric field is force per unit charge so its SI unit is N/C and for electric force SI unit is N.... View Article

State Conservation of Charge

The law of conservation of charge states that an electric charge can neither be created nor be destroyed. In an isolated system, the next charge... View Article

When conductors are placed in an electric field, their electrons are moved

Electrons in a conductor move in the opposite direction when placed in an electric field. Inside the conductor, now there are actually 2 equally... View Article

Quarks are entities that have____________

Quarks are entities that have fractional electric charges. Quarks are fundamental matter particles that are constituents of neutrons and... View Article

A silk cloth rubbed with a glass rod acquire a charge (-1.6 – 10 -19) C. Then the charge on the glass rod is

An equal and opposite charge is transferred from one body to another, when one body is rubbed with another.... View Article

A coulomb is same as:

Current = charge/time 1 amp = 1 coulomb/ 1 sec So, one coulomb is ampere times second.... View Article

The value of charge on a body which carries 30 excess electrons is

Here, n = 30 q =? e = - 1.6 × 10 -19 C So, q = n × e = 30 (-1.6 × 10-19 C) q = - 4.8 × 10 -18 C... View Article

When a hard rubber rod is given a negative charge by rubbing it with wool:

When a hard rubber rod is given a negative charge by rubbing it with wool negative charges are transferred from wool to rod.... View Article

According to the principle of conservation of charge___________

According to the principle of conservation of charge the total electric charge in an isolated system never changes. The charges are neither... View Article

Liquid pressure is measured by

To measure liquid pressure, a manometer is used. Liquid pressure is defined as the increase in the pressure when there is an increase in the... View Article

For uniform electric field, field lines are _______

Uniform electric field is represented by parallel and equally spaced filed lines. The region around the electric charge in which the stress or... View Article

Electric flux of a surface is maximum, when

The electric flux of a surface is maximum when the area vector is parallel to the direction of the electric field. The electric flux is the... View Article

A material in which electrons are tightly bound and cannot move freely at room temperature is called

Insulators are those materials in which electron are tightly bound and cannot move freely at room temperature.... View Article

Acceleration (a) of a body of radius R rolling down an inclined plane of inclination θ is given by

Acceleration (a) of a body of radius R rolling down an inclined plane of inclination θ is given by a = g sinθ / [1 + (K2/ R2)]... View Article

A solid sphere is made to roll down two inclined planes with same height but different lengths then:

Since the height is the same, the speed at the bottom will be the same. Therefore, the correct option is (d).... View Article

A body is rolling down an inclined plane without slipping. How does the acceleration of the rolling body depend on its radius?

The acceleration of the rolling body is independent of its radius... View Article

The kinetic energy of a rolling wheel is

Rolling wheel’s K.E will comprise of both translational K.E. and Rotational K.E.... View Article

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