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Electricity Class 10th Question Bank

What is electric current?

Electric current is the flow of electric charge through a conductor.

 

What is the unit of electric current?

The unit of electric current is the ampere (A).

What is the difference between an electric conductor and an insulator?

An electric conductor is a material that allows electric charge to pass through it, while an insulator is a material that does not allow electric charge to pass through it.

What is resistance?

Resistance is the measure of opposition to the flow of electric current in a conductor.

What is Ohm’s law?

Ohm’s law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain constant.

What is a circuit diagram?

A circuit diagram is a graphical representation of an electric circuit, showing the components and their connections.

What is the difference between a series circuit and a parallel circuit?

In a series circuit, the components are connected one after the other, so that the same current flows through each component. In a parallel circuit, the components are connected in parallel branches, so that the current is divided among them.

What is a fuse?

A fuse is a safety device that breaks the circuit when the current flowing through it exceeds a certain limit, thus protecting the other components from damage.

What is an electric motor?

An electric motor is a device that converts electrical energy into mechanical energy.

What is an electric generator?

An electric generator is a device that converts mechanical energy into electrical energy.

What is an electric cell?

An electric cell is a device that converts chemical energy into electrical energy.

What is the difference between a primary cell and a secondary cell?

A primary cell cannot be recharged, while a secondary cell can be recharged.

What is an electric circuit?

An electric circuit is a closed path through which electric current can flow.

What is the direction of flow of electric current?

The direction of flow of electric current is from the positive terminal of the battery to the negative terminal.

What is a potential difference?

Potential difference is the difference in electric potential between two points in an electric circuit.

What is the unit of potential difference?

The unit of potential difference is the volt (V).

What is the relationship between electric power, current, and voltage?

Electric power is equal to the product of current and voltage.

What is the unit of electric power?

The unit of electric power is the watt (W).

What is an electric circuit breaker?

An electric circuit breaker is a safety device that automatically breaks the circuit when the current flowing through it exceeds a certain limit, thus protecting the other components from damage.

What is an electric switch?

An electric switch is a device that is used to open or close an electric circuit.

What is the difference between direct current (DC) and alternating current (AC)?

Direct current flows in one direction only, while alternating current changes direction periodically.

What is an electromagnet?

An electromagnet is a type of magnet that is created when an electric current flows through a coil of wire, producing a magnetic field.

What is the role of an earth wire in an electrical circuit?

The earth wire provides a path for the current to flow safely to the ground, in case of a fault or short circuit.

What is the function of a capacitor in an electric circuit?

A capacitor stores electrical energy and releases it when required, smoothing out fluctuations in voltage.

What is the difference between a primary cell and a secondary cell?

A primary cell is a non-rechargeable cell that cannot be recharged, while a secondary cell is a rechargeable cell that can be recharged and used multiple times.

What is the principle behind the working of an electric bell?

An electric bell works on the principle of an electromagnet. When an electric current is passed through a coil of wire, it creates a magnetic field that attracts a metal strip, causing a clapper to strike a bell.

What is the difference between power and energy?

Power is the rate at which energy is consumed or produced, while energy is the capacity to do work.

What is the effect of increasing the resistance in a circuit?

Increasing the resistance in a circuit reduces the flow of electric current.

What is the difference between a voltmeter and an ammeter?

A voltmeter measures the voltage across a component in an electric circuit, while an ammeter measures the current flowing through a component.

What is the role of a transformer in an electric circuit?

A transformer is used to change the voltage of an alternating current, either increasing or decreasing it depending on the application.

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