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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
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.
Draw circuit symbols for
a cell
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.
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.
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, 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?
Write the condition required for a circuit to be a closed circuit.
What do you understand by the closed electric circuit
Name the instrument used to control current in an electric circuit.
Explain the following:
Closed circuit
What is 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?
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 circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit ______.
In the circuit shown, which switches (L,M or N) must be closed to light up the bulb?
Which of the following a simple circuit must-have?
_____ has a thin metallic filament that melts and breaks the connection when the circuit is overheated.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
State whether true or false. If false, correct the statement.
Ammeter is connected in parallel in any electric circuit.
What is the role of the earth wire in domestic circuits?
Explain about domestic electric circuits. (circuit diagram not required)
The rate of flow of electric charges in a circuit is called ______.
In a circuit, if the key is in open (off) condition, then electricity will not flow.
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
A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.
When an electric current flows through a copper wire AB as shown in the following figure, the wire
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?
Will the bulb glow in the circuit shown in the following figure? Explain.
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.
How is Joule's law effect useful in electric circuits where fuse is used as a safety device?
