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प्रश्न
Tell the odd one out. Give proper explanation.
पर्याय
Fuse wire
Bad conductor
Rubber gloves
Generator
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उत्तर
Generator
Explanation:
Others restrict flow of current while generator is used to produce current.
संबंधित प्रश्न
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?
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.
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.
Name the instrument used to control current in an electric circuit.
Explain the following:
Open circuit
Explain the following:
Closed circuit
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How much is the potential difference between live and neutral wires?
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______ is the device used to close or open an electric circuit.
______ is the device used to close or open an electric circuit.
Tabulate the different components of an electric circuit and their respective symbols.
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In which among the following circuits does the bulb glow?
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
Fuse is
State whether true or false. If false, correct the statement.
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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
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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Name the device used these days in place of electric fuses in electrical circuits.
In an electric circuit a fuse is a ______ ______ to prevent possible fire.
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In which of the following circuits A, B and C given in the following figure, the cell will be used up very rapidly?
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.
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.
