CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Electric Power

In a circuit,...

Question

In a circuit, a voltmeter is connected in parallel with a resistance R and reads 20V. An ammeter is connected with this combination in series and reads 5A.
The correct value of resistance R is:

Open in App

Solution

V = IR
20 = 5R
$R = \frac{20}{5} = 4$

Suggest Corrections

thumbs-up

2

Similar questions

Q. A battery with EMF of

9 V

is connected in series with an ammeter and a voltmeter. Resistance of these devices are unknown. If the voltmeter is connected to a resistance

(

its value is also unknown

)

in parallel, the ammeter reading will be doubled, and the voltmeter reading halved. What will be the voltmeter reading (in

V

) after connecting the resistance ?

Q. In the circuit shown here, the ammeter A reads 5A and the voltmeter V reads 20V.The correct value of resistance R is

Q. An ideal battery of emf 1V is connected in series with an ammeter and voltmeter of unknown internal resistance. If certain resistance is connected in parallel with voltmeter, the voltmeter and ammeter readings become half and twice of their initial readings respectively. Initial reading of the voltmeter was

Q. An ammeter and a voltmeter are connected in series to a battery with an emf

ε = 6.0 V

. When a certain resistance is connected in parallel with the voltmeter, the reading of the voltmeter decreases

2.0 t i m e s

, whereas the reading of the ammeter increase the same number of times. Find the voltmeter reading after the connection of the resistance.

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Powerful Current

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard X Physics

Join BYJU'S Learning Program

CrossIcon