मराठी

How Do You Think the Brightness of Two Lamps Arranged in Parallel Compares with the Brightness of Two Lamps Arranged in Series (Both Arrangements Having One Cell)? - Science

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प्रश्न

How do you think the brightness of two lamps arranged in parallel compares with the brightness of two lamps arranged in series (both arrangements having one cell)?

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उत्तर

The brightness of two lamps arranged in parallel will be more compared with the brightness of two lamps arranged in series because a parallel circuit offers less resistance.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Electricity - Exercise 6

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संबंधित प्रश्‍न

The work done in moving a unit charge across two points in an electric circuit is a measure of: 

(a) current
(b) potential difference
(c) resistance
(d) power


Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs: 

(a) for decorating a hotel building from outside?


 Christmas tree lamps are usually wired in series. What happens if one lamps breaks?


Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel to the electric supply at 220 V.  


(a) Draw a circuit diagram to show the connections.
(b) Calculate the current drawn from the electric supply.
(c) Calculate the total energy consumed by the two lamps together when they operate for one hour.


State the S.I. unit of current.


Distinguish between an open and a closed circuit.


The work done in moving unit positive charge across two points in an electric circuit is a measure of
           


What is fuse? Name the material of fuse.

An electric bulb is rated at 220 V, 100 W. What is its resistance? What maximum current can be passed through it?

What do you mean by direct current?

The circuit diagram (Fig.) shows a battery of e.m.f. 6 volts and internal
resistance of 0.8 Ω oonnected in series. Find the
(a) Current reoorded by the ammeter,
(b) P.d. across the terminals of the resistor B,
( c) Current passing through each of the resistors B, C and D, and
( d) P.d. across the terminals of the battery.


A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:

(i) The resistance of the wire, and

(ii) The heat energy produced in 1 minute.


Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.


State the condition when it is advantageous to connect cells in series.


MCB is used to protect household electrical appliances.


Coulomb is the SI unit of ____________.


A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly


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

1020 electrons, each having a charge of 1.6 x 10-19 C, flows in a circuit V is 0.1s. What is the current in ampere?


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