Advertisements
Advertisements
प्रश्न
What is the potential difference?
Advertisements
उत्तर
The potential difference is the difference in the electric potential of two different points.
APPEARS IN
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.
What do the following symbols mean in circuit diagrams?

What is a circuit diagram
Explain with the help of a labelled circuit diagram how you will find the resistance of a combination of three resistors, or resistance R1, R2 and R3, joined in parallel. Also mention how you will connect the ammeter and the voltmeter in the circuit when measuring the current in the circuit and the potential difference across one of the three resistors of the combination.
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
Observe the following figure which bulb get fuse?

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.
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.
Write the condition required for a circuit to be a closed circuit.
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 |
Draw a neat diagram showing a open electric circuit.
What is open circuit?
The unit of electrical power is _______.
Write scientific reason.
It is beneficial to carry electrical energy in AC form as it is carried over long distances.
______ is the device used to close or open an electric circuit.
The switch is used to close or open an electric circuit.
In the given circuit diagram, which of the given switch(s) should be closed. So that only bulb A glows.

In which among the following circuits does the bulb glow?
Fuse is
When a circuit is open, _____ cannot pass through it.
What is the role of the earth wire in domestic circuits?
A device that is used to break an electric circuit is called ______.
Assertion: In an open circuit, the current passes from one terminal of the electric cell to another.
Reason: Generally, the metal disc of a cell acts as a positive terminal.
The rate of flow of electric charges in a circuit is called ______.
What are the types of electric circuits?
In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a 12 V battery will be
![]() |
![]() |
![]() |
| (i) | (ii) | (iii) |
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?
Choose the statement which is not correct in the case of an electric fuse.
In an electric circuit a fuse is a ______ ______ to prevent possible fire.
Draw the symbols of the following circuit components.
Switch in off position
Paheli is running short of connecting wires. To complete an electric circuit, she may use a ______.
Will the bulb glow in the circuit shown in the following figure? Explain.

A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire
Set up the circuit shown in Figure again. Move the key to ‘ON’ position and watch carefully in which direction the compass needle gets deflected. Switch ‘OFF’ the current. Now keeping rest of the circuit intact, reverse the connections at the terminal of the cell. Again switch ‘on’ the current. Note the direction in which the needle gets deflected. Think of an explanation.




