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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.
What do the following symbols mean in circuit diagrams?
Draw circuit symbols for
a battery of three cells
Draw circuit symbols for
A closed 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.
Tell the odd one out. Give proper explanation.
Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?
Observe the following figure which bulb get fuse?
Two tungsten bulbs of power 50 W and 60 W work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor?
Match the column ‘A’ with column ‘B’.
|
Column ‘A’
|
Column ‘B’ |
|
(1) Eka - boron
|
(a) Germanium
|
|
(2) Eka - Aluminium
|
(b) Scandium
|
|
(3) Eka - Silicon
|
(c) Gallium |
What do you understand by the closed electric circuit
Explain the following:
Open circuit
How much is the potential difference between live and neutral wires?
Increasing the current passing through the wire decreases the magnetic field intensity.
Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.
What is the use of earthing wire?
Draw the circuit diagram for the series connection.
In which among the following circuits does the bulb glow?
Which of the following a simple circuit must-have?
What is electric circuit?
The wiring in a house consists of ______ circuits.
Explain about domestic electric circuits. (circuit diagram not required)
______ is a kind of fish which is able to produce an electric current.
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.
In an electric circuit, the current starts from ______.
Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’
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?
The ______ is a species of fish that can give electric shocks of up to six hundred fifty watts of electricity.
What are the essential components of an electric circuit?
A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire
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?
