Electrostatics and Charge Quiz

The conductivity of a wire is directly proportional to the ____ of free electrons and the ____ time.

Materials that offer high resistance to the passage of electricity are called insulators.

Match the following units of charge with their corresponding systems:

The total charge of an isolated system is always ______.

Which of the following is NOT a type of continuous charge distribution?

What is the principle of superposition of electrostatic forces?

What is the SI unit of charge?

The electrostatic force of interaction between two stationary point charges is given by ______'s law.

Electrostatic forces are non-conservative forces.

What is the maximum potential difference between two electrodes of a cell when no current is drawn from it?

The internal resistance of a cell is independent of the distance between the electrodes.

The unit of magnetic field strength in the SI system is ______.

Which of the following factors does NOT affect the internal resistance of a cell?

Match the following units of magnetic field strength with their respective systems:

Who demonstrated the magnetic effect of current by observing the deflection of a magnetic needle near a current-carrying wire?

A stationary electron produces both electric and magnetic fields.

Alloys like constantan and manganin are used for making standard resistors because they have a ______ temperature coefficient of resistance.

How does the relaxation time in conductors change with increasing temperature?

The resistivity of a conductor decreases with increasing temperature.

What is the relationship between conductivity and temperature for metals and semiconductors?

In a series combination of resistances, the ______ through each resistance is the same.

Match the following terms with their definitions:

Which of the following statements is true about the drift velocity of electrons in two wires X and Y of the same diameter but different materials, connected in series?

Define conductivity of a conductor in terms of number density and relaxation time.

The current density in a conductor is directly proportional to the applied electric field.

The coils of a spring carrying current in the same direction attract each other.

What is the net force on the rectangular coil in the given scenario?

A positive charge enters a uniform magnetic field traveling parallel but opposite to the field direction. What force does it experience?

What is the ratio of the radii of the trajectories of an alpha particle and a proton in a uniform magnetic field, assuming they have equal linear momenta?

A galvanometer cannot be used directly to measure current in a circuit because it has ______ sensitivity and ______ resistance.

Match the following physical quantities with their corresponding units:

What is the purpose of using a shunt in converting a galvanometer into an ammeter?

The range of an ammeter can be increased or decreased by adjusting the value of the shunt resistance.

Explain the net resistance of an ammeter.

Which of the following statements about magnetic materials is true?

Magnetic field lines can start and end at any point in space.

Name one example of a ferromagnetic material.

When a diamagnetic material is placed in a magnetic field, the field lines are extit{______} due to the induced magnetism in the opposite direction.

Match the following types of magnetic materials with their characteristics:

What happens to the resistivity of a conductor as the temperature increases?

In the case of semiconductors, resistivity decreases with an increase in temperature.

What are Kirchhoff's rules used for in electrical circuits?

The expression for resistivity in terms of number density and relaxation time is given by 𝝆 = ______.

Match the following variables with their meanings: