help@askiitians.com

+91-87964 74404

Grade 12Electric Current

Two resistors of resistance 1 kilo ohm and 2 kilo ohms are in series and a source of 100 volts and negligible resistance is connected to it a voltmeter of 500 ohm is connected in turn across the resistors what are the reading of the voltmeter and how these readings differ from the reading of an ideal voltmeter?
Can someone please give me it's solution

Anudeep

7 Years agoGrade 12

1 Answer

Ketan Prakash

7 Years ago

Condintion for ideal voltmeter is R must be infinite.

R eq. = 3500 ohms.

Apply ohm's law , V=iR

i=100/3500 A = 1/35 A

Current flowing in the series is i=1/35 A

Since combination in series so all current is same everywhere.

In voltmeter when it is not ideal having Resistance 500 ohm , V=1/35 x 500 V

V=14.29v

Voltmeter when it is ideal means R equals to infinite ,i.e. ,V=iR = tends to infinite.

The fig. Shows a network of resistance in which the point A is earthed

electric current

0 Answer Available

Last Activity: 4 Years ago

When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?

electric current

0 Answer Available

Last Activity: 4 Years ago

Please provide it's solution. In video form
Find the equivalent resistance of the given figure

electric current

1 Answer Available

Last Activity: 4 Years ago

The resistivity of material is 10 ohm m at 30 C when the temperature drops to 28 then the resistivity drops by 2. The temperature coefficient of resistivity of material is

electric current

1 Answer Available

Last Activity: 4 Years ago

Three cells of 2.0v each and internal resistance of 1.0 each are connected in series and in parallel calculate the new emf and new internal resistance in each connection

electric current

1 Answer Available

Last Activity: 4 Years ago

View all Questions