A rotary potentiometer has a circular re...

A rotary potentiometer has a circular resistance (C) and a conducting wiper (W) can rotate over it. An ideal battery and an ideal voltmeter are connected to it as shown in the figure. As the wiper is rotated on the circular resistance the reading of the voltmeter changes from zero to `20 V`. What is reading of the voltmeter when wiper is at angular position `theta = 120^(@)` ? Assume that resistance C is almost a complete circle and resistance of all connecting wires and knobs in the circuit is zero.

Text Solution

Verified by Experts

The correct Answer is:

13.33 volt

Topper's Solved these Questions

CAPACITOR
ARIHANT|Exercise Capacitor|50 Videos
ELECTROMAGNETIC INDUCTION
ARIHANT|Exercise Level 3|12 Videos

Similar Questions

Explore conceptually related problems

The voltmeter in figure has a resistance of 200 Omega . The reading of voltmeter is

[" A non-ideal voltmeter and a non-ideal ammeter are connected as shown in the figure.The reading of "],[" the voltmeter is "20V" and that of the ammeter is "4A" .The value of "R" is : "]

A circuit is shown in the figure. The ratio of readings of ideal voltmeter to reading of ideal ammeter is

An ammeter A, a voltmeter V and a resistance R are connected as shown in the figure. If the voltmeter reading is 1.6V and the ammeter reading is 0.4 A, then R is

An ideal ammeter (zero resistance) and an idel voltmeter (infinite resistance) are connect as shows in Fig. 6.47 . The ammeter and the voltmeter readings are

In the combination shown in the figure, the ideal voltmeter reading will be

[" A non-ideal voltmeter and a non-ideal ammeter are connected as shown in the figure.The reading of "],[" the voltmeter is "20V" and that of the ammeter is "4A" .The value of "R" is : "],[qquad (A)/(0)]

In the given circuit, the reading of ideal voltmeter is E//2 . The internal resistance of the battery is

ARIHANT-CURRENT ELECTRICITY-Current Electricity

In the circuit shown, which way would you move the sliding contact, to...
Text Solution
|
In the circuit shown in figure. AB is a uniform wire of length L and r...
Text Solution
|
A rotary potentiometer has a circular resistance (C) and a conducting ...
Text Solution
|
In the figure shown PQ is a potentiometer wire. When galvanometer is c...
Text Solution
|
Three resistors R(1) = 3 k Omega,R(2) = 2 k Omega and R(3) = 5 k Omega...
Text Solution
|
In the circuit shown in figure the voltmeters V(1) & V(2) are identica...
Text Solution
|
A lab voltmeter has scale as shown in figure. A student uses this near...
Text Solution
|
A 10 wire potentiometer has first five wires of cross sectional radius...
Text Solution
|
A water heater has a well insulated vertical cylindrical container of ...
Text Solution
|
In the circuit shown in figure AB is a uniform wire of length L = 5m. ...
Text Solution
|
In the circuit shown, after the switch is shifted to position 2 the he...
Text Solution
|
In the circuit shown in figure B(1), B(2) and B(3) are identical bulbs...
Text Solution
|
When the applied potential difference across a circuit element is incr...
Text Solution
|
In the circuit shown the switch is closed at time t = 0. Plot the foll...
Text Solution
|
A capacitor having initial change q(0) and capacitance C is connected ...
Text Solution
|
A parallel plate capacitor has plate area A and separation between the...
Text Solution
|
Consider the circuit shown in the figure. The switch has been in posit...
Text Solution
|
An electric bulb has a solid cylindrical filament of length l and radi...
Text Solution
|
A battery of emf V and internal resistance r is connected to N identic...
Text Solution
|
A copper wire of length 5 cm carries a current of density j = 1 A (mm)...
Text Solution
|