Advertisements
Advertisements
प्रश्न
What is the potential difference?
उत्तर
The potential difference is the difference in the electric potential of two different points.
APPEARS IN
संबंधित प्रश्न
Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 Ω resistors. What would be the readings in the ammeter and the voltmeter?
What is a circuit diagram
Draw a circuit diagram to show how 3 bulbs can be lit from a battery so that 2 bulbs are controlled by the same switch the third bulb has its own switch.
Tell the odd one out. Give proper explanation.
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
Observe the following figure which bulb get fuse?
The following figure shows the symbols for components used in the accompanying electrical circuit. Place them at proper places and complete the circuit.
Which law can you prove with the help of above circuit?
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.
In an electric circuit, a battery and a bulb have been connected and the battery consists of two cells of equal potential difference. If the bulb is not glowing, then which tests will you perform in order to find out the reason for the bulb not glowing?
Name the instrument used to control current in an electric circuit.
Explain the following:
Open circuit
In any electric circuit, when the switch is on and the current flows through it why do the wire, switches, bulb or devices become hot?
The unit of electrical power is _______.
How much is the potential difference between live and neutral wires?
Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.
What is the use of earthing wire?
In the given circuit diagram, which of the given switch(s) should be closed. So that only bulb A glows.
In the circuit shown, which switches (L,M or N) must be closed to light up the bulb?
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?
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
Three bulbs are connected end to end from the battery. This connection is called _______.
The wiring in a house consists of ______ circuits.
Explain about domestic electric circuits. (circuit diagram not required)
Instead of metal wires, a jute string can be used to make a circuit.
The rate of flow of electric charges in a circuit is called ______.
What are the types of electric circuits?
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2Ω in series with a combination of two resistors (4Ω each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2Ω resistor be the same as that across the parallel combination of 4Ω resistors? Give reason.
Choose the statement which is not correct in the case of an electric fuse.
What are the essential components of an electric circuit?
In the following arrangement shown in Fig. 12.2, the bulb will not glow if the ends A and B are connected with
Paheli connected two bulbs to a cell as shown in Fig. 12.8.
She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.
Name the device which is used to measure the strength of the electric current in an electric circuit.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
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.
