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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
fixed resistance
Draw circuit symbols for
a cell
Draw circuit symbols for
a battery of three cells
Draw circuit symbols for
an open switch
Draw circuit symbols for
A closed switch
What is a circuit diagram
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
In an electric circuit, electron flow a from of point of ______ potential to the point of ______ potential.
Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances.
What do you understand by the closed electric circuit
Draw a neat diagram showing a closed electric circuit.
In any electric circuit, when the switch is on and the current flows through it why do the wire, switches, bulb or devices become hot?
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?
Find the odd one out and give its explanation.
Write scientific reason.
It is beneficial to carry electrical energy in AC form as it is carried over long distances.
The switch is used to close or open an electric circuit.
Draw the circuit diagram for the series connection.
Rahul wants to make an electric circuit. He has a bulb, two wires, a safety pin, and a piece of copper. He does not have any electric cell or battery. Suddenly he gets some idea. He uses lemon instead of a battery and makes a circuit. Will the bulb glow?
Fuse is
When a circuit is open, _____ cannot pass through it.
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.
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.
Our body is a ______ of electricity.
Draw the symbols of the following circuit components.
Switch in off position
The ______ is a species of fish that can give electric shocks of up to six hundred fifty watts of electricity.
Paheli is running short of connecting wires. To complete an electric circuit, she may use a ______.
Paheli connected two bulbs to a cell as shown in the following figure.
She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.
Overloading of electric circuits can lead to short-circuiting.
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.
