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If the Amount of Electric Charge Passing Through a Conductor in 10 Minutes is 300 C, the Current Flowing Is: (A) 30 a (B) 0.3 a (C) 0.5 a (D) 5 a

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प्रश्न

If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is:

(a) 30 A
(b) 0.3 A
(c) 0.5 A
(d) 5 A

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उत्तर

0.5 A

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अध्याय 4: Electricity - Exercise 2

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लखमीर सिंग Physics [English] Class 10
अध्याय 4 Electricity
Exercise 2 | Q 31

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संबंधित प्रश्न

Define the unit of current.


Three 2 V cells are connected in series and used as a battery in a circuit.

 What is the p.d. at the terminals of the battery?


If the charge on an electron is 1.6 × 1019 coulombs, how many electrons should pass through a conductor in 1 second to constitute 1 ampere current?


Which unit could be used to measure current?

(a) Watt
(b) Coulomb
(c) Volt
(d) Ampere


In the circuit diagram given below five resistances of 10 Ω, 40 Ω, 30 Ω, 20 Ω, and 60 Ω are connected as shown to a 12 V battery. 

  

Calculate:
(a) total resistance in the circuit. 

(b) total current flowing in the circuit.

 


The figure given below shows an electric circuit in which current flows from a 6 V battery through two resistors. 

 

  1. Are the resistors connected in series with each other or in parallel?
  2. For each resistors, state the p.d. across it.
  3. The current flowing from the battery is shared between the two resistors. Which resistor will have bigger share of the current?
  4. Calculate the effective resistance of the two resistors.
  5. Calculate the current that flows from the battery.

Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line. 

(c) In which circuit, if one bulb blows out, all other will stop glowing?


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?


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.


Define the term resistivity. 


A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire


Three resistors of 6.0 𝛀, 2.0𝛀 and 4.0𝛀 are joined to an ammeter A and a cell of e.m.f. 6.0 V as
shown in fig 8.52 Calculate:
(a) the effective resistance of the circuit and
(b) the reading of ammeter. 

 


Where is the main fuse in a house circuit connected?

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

State the commercial unit of electrical energy.

Explain with the help of a diagram how does 'short circuiting' occur in an electric kettle.


Define the term kilowatt - hour and state its value in S.I. unit.


Answer the following question.
What is the function of a galvanometer in a circuit?


An electric bulb is marked 100 W, 250 V. How much current will the bulb draw if connected to a 250 V supply?


  1. What is meant by electric current?
  2. Name and define its unit.
  3. Which instrument is used to measure the electric current? How should it be connected in a circuit?

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