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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.
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?
Draw circuit symbols for variable resistance
Draw circuit symbols for
a cell
Draw circuit symbols for
an open switch
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?
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.
Observe the following figure which bulb get fuse?
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- What must be the potential difference across individual appliances?
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- Why are the domestic appliances connected in this way?
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Draw a neat diagram showing a closed electric circuit.
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Open circuit
Find the odd one out and give its explanation.
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Tabulate the different components of an electric circuit and their respective symbols.
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The wiring in a house consists of ______ 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.
In a circuit, if the key is in open (off) condition, then electricity will not flow.
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?
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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Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’
Draw the symbols of the following circuit components.
Switch in off position
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?
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Write a short note on the different electrical circuits.
Name the device which is used to measure the strength of the electric current in an electric circuit.
An electric motor rated 1100 W is connected to 220 V mains. Find:
- The current drawn from the mains,
- Electric energy consumed if the motor is used for 5 hours daily for 6 days.
- Total cost of energy consumed if the rate of one unit is 5.
