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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit ______.

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प्रश्न

In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit ______.

विकल्प

  • 10 A

  • 1 A

  • 10 V

  • 1 V

MCQ
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उत्तर

In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit 10 A.

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अध्याय 2: Electricity - Evaluation [पृष्ठ ३२]

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सामाचीर कलवी Science - Term 2 [English] Class 7 TN Board
अध्याय 2 Electricity
Evaluation | Q I. 1. | पृष्ठ ३२

संबंधित प्रश्न

Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 Ω resistors. What would be the readings in the ammeter and the voltmeter?


Draw circuit symbols for 

A closed switch


The accompanying figure shows some electrical appliances connected in a circuit in a house. Answer the following questions.

  1. By which method are the appliances connected?
  2. What must be the potential difference across individual appliances?
  3. Will the current passing through each appliance be the same? Justify your answer.
  4. Why are the domestic appliances connected in this way?
  5. If the T.V. stops working, will the other appliances also stop working? Explain your answer.

Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances. 


How much is the potential difference between live and neutral wires?


In the given circuit diagram, which of the given switch(s) should be closed. So that only bulb A glows.


In a simple circuit, why does the bulb glow when you close the switch?


Overloading of electric circuits can lead to short-circuiting.


Name the device which is used to measure the strength of the electric current in an electric circuit.


An electric motor rated 1100 W is connected to 220 V mains. Find: 

  1. The current drawn from the mains,
  2. Electric energy consumed if the motor is used for 5 hours daily for 6 days.
  3. Total cost of energy consumed if the rate of one unit is 5.

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