मराठी

How Many Microamperes Are There in 1 Ampere?

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प्रश्न

How many microamperes are there in 1 ampere?

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उत्तर

1 ampere = 1,000,000 microamperes = `10^6` microamperes  

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पाठ 4: Electricity - Exercise 2 [पृष्ठ १९६]

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लखमीर सिंह Physics Part 1 [English] Class 10
पाठ 4 Electricity
Exercise 2 | Q 8. (b) | पृष्ठ १९६

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

1 A = _________ mA

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

Fill in the blank:

To increase the effective resistance in a circuit the resistors are connected in _____________.


A student made an electric circuit shown here to measure the current through two lamps.

Are the lamps in series or parallel?  

(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram. 


A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:


(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel.
(b) In the circuit diagram shown below, find:

(i) Total resistance.
(ii) Current shown by the ammeter A 


A battery and three lamps are connected as shown: 

 

Which of the following statements about the currents at X, Y and Z is correct?
(a) The current at Z is greater than that at Y.
(b) The current at Y is greater than that at Z.
(c) The current at X equals the current at Y.
(d) The current at X equals the current at Z. 

 


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.


Which effect of current is utilised in an electric light bulb?


The following circuit diagram shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f 2V and internal resistance 3 Ω. If the main current of 0.25 A flows through the circuit, find:

  1. the p.d. across the 4 Ω resistors,
  2. the p.d. across the internal resistance of the cell,
  3. the p.d. across the R Ω or 2 Ω resistors, and
  4. the value of R.


By what name is the unit joule/coulomb called?

How many electrons are present in 1 C?

Can a copper wire be used as a fuse wire?

Name the principle on which a transformer works.


State the S.I. units of electrical power.


Calculate the current through a 60 W lamp rated 250 V. If the line voltage falls to 200 V, how is power consumed by the bulb affected?


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 energy dissipated in the bulb in 10 minutes.


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


Define the following:

Conventional current


A continuous and closed path of an electric current is called:


The SI unit of electric current is:


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