Advertisements
Advertisements
प्रश्न
The unit of electrical power is _______.
पर्याय
volt
watt
joule
ampere
Advertisements
उत्तर
The unit of electrical power is watt.
Explanation:
It is defined as 1 joule per second (1 W = 1 J/s). It represents the rate at which electrical energy is consumed or produced.
संबंधित प्रश्न
Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 Ω resistor, an 8 Ω resistor, and a 12 Ω resistor, and a plug key, all connected in series.
Draw circuit symbols for
an open switch
What is a circuit diagram
Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
Resistances R1, R2, R3 and R4 are connected as shown in the figure. S1 and S2 are two keys. Discuss the current flowing in the circuit in the following cases.
- Both S1 and S2 are closed.
- Both S1 and S2 are open.
- S1 is closed but S2 is open.
The accompanying figure shows some electrical appliances connected in a circuit in a house. Answer the following questions.
- By which method are the appliances connected?
- What must be the potential difference across individual appliances?
- Will the current passing through each appliance be the same? Justify your answer.
- Why are the domestic appliances connected in this way?
- If the T.V. stops working, will the other appliances also stop working? Explain your answer.
In an electric circuit, electron flow a from of point of ______ potential to the point of ______ potential.
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances.
Name the instrument used to control current in an electric circuit.
What is the potential difference?
How much is the potential difference between live and neutral wires?
Increasing the current passing through the wire decreases the magnetic field intensity.
What is the use of earthing wire?
Flow of electricity through a closed circuit is _____.
In the given circuit diagram, which of the given switch(s) should be closed. So that only bulb A glows.
Tabulate the different components of an electric circuit and their respective symbols.
Rahul wants to make an electric circuit. He has a bulb, two wires, a safety pin, and a piece of copper. He does not have any electric cell or battery. Suddenly he gets some idea. He uses lemon instead of a battery and makes a circuit. Will the bulb glow?
In which of the following circuits are the bulb connected in series?
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
Study the three electric circuits below. Each of them has a glass rod (G), a steel rod (S), and a wooden rod (W).
In which of the electric circuits would the bulb not light up.
Three bulbs are connected end to end from the battery. This connection is called _______.
What is the role of the earth wire in domestic circuits?
______ is a kind of fish which is able to produce an electric current.
What are the types of electric circuits?
In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?
In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be
A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 Ω in series with a combination of two resistors (4 Ω each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 Ω resistor be the same as that across the parallel combination of 4 Ω resistors? Give reason.
When an electric current flows through a copper wire AB as shown in the following figure, the wire
Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’
The ______ is a species of fish that can give electric shocks of up to six hundred fifty watts of electricity.
Match the following
| 1. | Insulator | a. | Coulomb |
| 2. | Conductor | b. | Electric circuit |
| 3. | Closed path | c. | Copper |
| 4. | Electric charge | d. | Rubber |
Will the bulb glow in the circuit shown in the following figure? Explain.
Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.
