Advertisements
Advertisements
प्रश्न
Match the column ‘A’ with column ‘B’.
Column ‘A’
|
Column ‘B’ |
(1) Eka - boron
|
(a) Germanium
|
(2) Eka - Aluminium
|
(b) Scandium
|
(3) Eka - Silicon
|
(c) Gallium |
उत्तर
Column ‘A’
|
Column ‘B’
|
(1) Eka - boron
|
(b) Scandium |
(2) Eka - Aluminium
|
(c) Gallium |
(3) Eka - Silicon
|
(a) Germanium |
APPEARS IN
संबंधित प्रश्न
What do the following symbols mean in circuit diagrams?
Draw circuit symbols for
an open switch
Tell the odd one out. Give proper explanation.
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
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.
A battery is to be formed by joining 3 dry cells with connecting wires. Show how will you connect the wires by drawing a diagram.
What do you understand by the closed electric circuit
Draw a neat diagram showing a open electric circuit.
Explain the following:
Open circuit
Explain the following:
Closed circuit
Find the odd one out and give its explanation.
How much is the potential difference between live and neutral wires?
Increasing the current passing through the wire decreases the magnetic field intensity.
Higher Order Question
A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder), and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.
- What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?
_____ has a thin metallic filament that melts and breaks the connection when the circuit is overheated.
In a simple circuit, why does the bulb glow when you close the switch?
When a circuit is open, _____ cannot pass through it.
The wiring in a house consists of ______ circuits.
Explain about domestic electric circuits. (circuit diagram not required)
The rate of flow of electric charges in a circuit is called ______.
______ is a kind of fish which is able to produce an electric current.
In a circuit, if the key is in open (off) condition, then electricity will not flow.
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?
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.
When an electric current flows through a copper wire AB as shown in Figure14.1, the wire
Choose the statement which is not correct in the case of an electric fuse.
Three bulbs A, B, and C are connected in a circuit as shown in Figure 14.2. When the switch is ‘ON’
In an electric circuit a fuse is a _________ _______ to prevent possible fire.
In the above circuit, if the current reading in the ammeter A is 2A, what would be the value of R1?
What are the essential components of an electric circuit?
In which of the following circuits A, B, and C gave in Fig. 12.4, the cell will be used up very rapidly?
Write a short note on the different electrical circuits.