मराठी

Which of the Following Equation Shows the Correct Relationship Between Electrical Unit? 1a = 1c/S Or 1c= 1a/S - Science

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प्रश्न

Which of the following equation shows the correct relationship between electrical unit? 

1A = 1C/s or 1c= 1A/s 

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उत्तर

Because current, I = Q/t, the correct relationship is  

`1A= (1C)/(1s)` 

 

 

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पाठ 1: Electricity - Exercise 2

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संबंधित प्रश्‍न

1 A = _________ mA

  1. 102
  2. 103
  3. 10-3
  4. 10-6

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


What is the Flow of Charge Called?


What is the unit of electric current?


Compare how an ammeter and a voltmeter are connected in a circuit.


Fill in the folloing blank with suitable words:  

 Current is measured in ............... using an ............... placed in ............... in a circuit.


An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.  

Following graph was plotted between V and I values: 

 

What would be the values of `V/I` rations when the potential difference is 0.8 V, 1.2 V and 1.6 V respectively?
What conclusion do you draw from these values?
 
What is the resistance of the wire? 


Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.


 Draw a circuit diagram showing two lamps, one cell and a switch connected in series.
 How can you change the brightness of the lamp?


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.


What do you mean by watt-hour?

Why is an ammeter always connected in series while the voltmeter always in parallel to a circuit across which voltage is to be measured?

The circuit diagram in fig  shows two coils of an insulated copper wire wound on a cardboard tube. G is a center zero galvanometer.

(a) Describe what will happen when th e swi tch K is cl osed for severa l
seconds and then opened again .
(b) What will be the effect of repeating the experiment with an iron placed in the tube?


An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.


A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:

The total energy supplied by the battery in 10 minutes


What is meant by internal resistance of a cell?


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


Three resistances, of which two are equal when connected in series have an effective resistance of 30 ohms. When the three resistances are connected in parallel, the effective resistances is 3 ohms. Find the values of the individual resistances.


An ammeter is always placed in parallel with the circuit.


Find the odd one out.

Loudspeaker, Bar magnet/magnet, Electric motor, Microphone.


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