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Current Electricity

Question
CBSEENPH12039989
Wired Faculty App

In the given circuit the reading of voltmeter V1 and V2 are 300 V each. The reading to the voltmeter V3 and ammeter A are respectively

  • 150 V, 2.2 A

  • 220 V , 2.2 A

  • 220 V, 2.0 A

  • 100 V, 2.0 A

Solution

B.

220 V , 2.2 A

For series LCR circuit 
Voltage, 
straight V space equals space square root of straight V subscript straight R superscript 2 plus left parenthesis straight V subscript straight L minus straight V subscript straight C right parenthesis squared end root Since comma space straight V subscript straight L space equals space straight V subscript straight c space hence space straight V space equals space straight V subscript straight R space equals space 220 space straight V also comma space current comma space straight i space equals space straight V over straight R space equals space 220 over 100 space equals space 2.2 space straight A

Some More Questions From Current Electricity Chapter

What conclusion can you draw from the following observations on a resistor made of alloy manganin?

Current A

Voltage V

Current A

Voltage V

0.2

0.4

0.6

0.8

1.0

2.0

3.94

7.87

11.8

15.7

19.7

39.4

3.0

4.0

5.0

6.0

7.0

8.0

59.2

78.8

98.6

118.5

138.2

158.0

Answer the following questions:
A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed?

Answer the following questions:
Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s law.

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