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प्रश्न
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
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उत्तर
Generator.
All others are related to safety measures to avoid mishap due to electricity.
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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 do the following symbols mean in circuit diagrams?
Draw circuit symbols for
a battery of three cells
Draw the labelled diagram of an electric circuit comprising of a cell, a resistance, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance : an ammeter or a voltmeter?
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?
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.
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.
What do you understand by the closed electric circuit
Draw a neat diagram showing a closed electric circuit.
Name the instrument used to control current in an electric circuit.
Explain the following:
Open circuit
If you touch an electric wire carrying current you get a shock, but if on the same wire the birds sit they do not get any shock/current. Explain why?
The unit of electrical power is _______.
Right or wrong sentence.
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Flow of electricity through a closed circuit is _____.
Draw the circuit diagram for the series connection.
Tabulate the different components of an electric circuit and their respective symbols.
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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?
Three bulbs are connected end to end from the battery. This connection is called _______.
In a circuit, if the key is in open (off) condition, then electricity will not flow.
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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.
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Choose the statement which is not correct in the case of an electric fuse.
Our body is a ______ of electricity.
Observe the circuit given:
1. Would any of the bulbs glow when the switch is in the ‘OFF’ position?
2. What will be the order in which the bulbs A, B, and C will glow when the switch is moved to the ‘ON’ position?
In the following arrangement shown in the following figure, the bulb will not glow if the ends A and B are connected with
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Name the device which is used to measure the strength of the electric current in an electric circuit.
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Reason: Lightning carries very high voltage.
