C-10 — Static Electricity

Which of the following phenomena is caused by static electricity?

The center of an atom is called the —

Which sub-atomic particle has no charge?

The magnitude of the charge of a proton is —

Which particle is negatively charged?

Out of 118 known atoms, how many are stable?

A water molecule is formed by —

Cooking gas (methane) consists of —

The simplest atom is —

The nucleus of a helium atom contains —

The process of removing electrons from an atom is called —

If two electrons are removed from a neutral atom, the atom becomes —

Which group consists only of electrical conductors?

Which one of the following is a non-conductor of electricity?

In a neutral atom —

Excluding hydrogen, in a stable atom —

Consider the following statements:

When a glass rod is rubbed with silk, the glass rod becomes —

When a glass rod is rubbed with silk, electrons move from —

Why does glass become positively charged when rubbed with silk?

When plastic is rubbed with flannel —

Two like-charged bodies brought near each other —

Two unlike charges —

Unlike gravitational force, electric force —

Which of the following statements is true?

The process by which a neutral body acquires charge without contact is called —

When a positively charged rod is brought near a neutral metal sphere kept on an insulating stand —

Why do paper pieces fall away from a comb after sticking to it?

Static-electricity experiments work poorly during the rainy season because —

A child's hair stands up while crawling on a carpet because —

Lightning is caused by —

Consider the following statements about electrostatic induction:

Which device is used to detect the presence of static charge?

The leaves of an electroscope are usually made of —

The leaves of a charged electroscope diverge because —

To determine the nature of an unknown charge using an electroscope, one must first —

A positively charged electroscope is touched by an object and the gap between the leaves decreases. The charge on the object is —

The disc, rod and leaves of an electroscope are made of conducting material so that —

According to Coulomb's law, the force between two point charges is —

The value of the Coulomb constant $k$ is —

The unit of the constant $k$ in Coulomb's law is —

The SI unit of electric charge is —

One coulomb of charge passes a point when —

The charge of an electron is —

Two charges of $+2$ C and $-2$ C are placed 1 m apart. The force between them is —

The magnitude of the force between $+1$ C and $-1$ C charges placed 10 cm apart is —

If the distance between two point charges is doubled, the electrostatic force between them becomes —

Two charges $q_1$ and $q_2$ produce a force $F$ at distance $r$. If both charges are doubled and the distance is halved, the new force becomes —

Two negative charges always —

The charge of a proton is —

Electric field intensity at a point is defined as —

The SI unit of electric field is —

The electric field at a distance of 10 m due to a 5 C charge is —

A 3 C charge experiences a force of 10 N. The electric field at the location is —

The concept of electric lines of force was first introduced by —

Lines of force around an isolated positive charge —

Lines of force around an isolated negative charge —

Where electric lines of force are denser, the electric field is —

Lines of force from one charge —

At the midpoint of the line joining two equal positive charges, the electric field is —

The relation $F = Eq$ implies that —

The tangent drawn to a line of force at a point gives —

The electric potential at a point is the work done in bringing —

The SI unit of electric potential is —

1 volt is equal to —

The electric potential at a distance $r$ from a point charge $q$ is given by —

Electric potential is a —

If 10 J of work is required to bring a charge of 2 C from infinity to a point, the potential at that point is —

Charge flows from one point to another due to —

A crow on a high-voltage wire is not shocked because —

In everyday potential measurements, the reference zero potential is taken as that of the —

Heavy electrical equipment is grounded (earthed) so that —

A potential difference of 2 V between two points means —

The capacitance of a conductor is the ratio of —

The SI unit of capacitance is —

The capacitance of an isolated metallic sphere of radius $r$ is —

The energy stored in a capacitor of capacitance $C$ at voltage $V$ is —

The energy stored in a 20 µF capacitor when 10 V is applied is —

The energy stored in a 10 µF capacitor at 12 V is —

The simplest practical capacitor consists of —

In a photocopy machine, ink particles stick to the roller because —

The Van de Graaff machine is used to —

Charge inside a Van de Graaff sphere is transferred to the outer surface because —

A metal chain is hung from a fuel truck to —

While working with sensitive ICs, the worker wears a grounding wrist-strap to —

A lightning arrestor on a tall building works because —

The speed of sound, used to estimate the distance to lightning, is approximately —

We see the lightning flash before hearing the thunder because —

During a thunderbolt, the temperature of the air can rise up to about —

In an electrostatic colour spray, the paint particles spread out evenly because —

The thunder we hear during a thunderbolt is —

The apparatus used in Investigation 10.01 is —

After combing the hair, the aluminium-foil ball jumps toward the comb because —

The aluminium-foil ball jumps away soon after touching the comb because —

The name of the apparatus used to determine the presence of charge is —

On which factor does the electrostatic force between two charges not depend?

The unit of electric field intensity is —

Two charged spheres A and B are shown in Figure 10.18. Consider the following:

A 10 µF capacitor is connected to a 12 V potential difference. How much energy is stored in the capacitor?

Charge is a fundamental property of matter that —

If the electric potential at a point is zero, then the electric field at that point —

When Rima combs her hair, the comb gets charged because —

To determine the nature of the charge on Rima's comb using an electroscope, one should —

Electric force is the force that acts between —

Electric field and electric field intensity differ because —

In a system of three collinear charges, the net electric force on a particular charge is zero when —

A neutral atom is electrically neutral because —

An uncharged object becomes charged by friction when —

A child's hair stands up while crawling on a carpet because —

A potential difference of 2 V between two points in an electric field means —