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प्रश्न
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
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उत्तर
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संबंधित प्रश्न
Fill in the blank:
To increase the effective resistance in a circuit the resistors are connected in _____________.
What actually travels through the wires when you switch on a light?
How many microamperes are there in 1 ampere?
What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?
What happens to the other bulbs in a parallel circuit if one bulb blows off?
Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs:
(b) for lighting inside the rooms of the hotel?
Consider the circuit given below when A, B and C are three identical light bulbs of constant resistance. 
(a) List the bulbs in order of increasing brightness.
(b) If C burns out, what will be the brightness of A now compared with before?
(c) If B burns out instead, what will be the brightness of A and C compared with before?
Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω
A wire of uniform thickness with a resistance of 27Ω is cut into three equal pieces and they are joined in parallel. Find the equivalent resistance of the parallel combination.
Calculate the equivalent resistance between A and B in the adjacent diagram.
State the relation between work, charge and potential difference for an electric circuit.
Tell the odd one out. Give a proper explanation.
The work done in moving unit positive charge across two points in an electric circuit is a measure of
What should I choose ___________________
b. for getting protection from electric current.
c. to measure the current in the circuit?
State the conditions for the flow of charge in a circuit from one point to the other.
Match the following:
| 1. | 1 mA | a. | series |
| 2. | 1 pA | b. | ohmmeter |
| 3. | Ammeter | c. | 10-6 ampere |
| 4. | Electrical resistivity | d. | 10-3 ampere |
