Home
Class 12
PHYSICS
1 ohm resistance is in series with a Amm...

1 ohm resistance is in series with a Ammeter which is balanced by 75 cm of potentiometer wire. A standard cell of 1.02 V is balanced by 50 cm.t he ammeter shows a reading of 1.5 A. The error in the ammeter reading is

A

0.002 A

B

0.03 A

C

1.01 A

D

no error

Text Solution

Verified by Experts

The correct Answer is:
B
`V_(1)/V_(2) = l_(1)/l_(2) = 75/50 rArr V_(1) = 1.53V`
`I_(1) = V_(1)/1 = 1.53A`, error `= 1.53 - 1.50 = 0.03`
Promotional Banner

Similar Questions

Explore conceptually related problems

The emf of a battery A is balanced by a length 80 cm on a potentio meter wire. The emf of a standard cell 1 v is balanced by 50 cm. the emf of A is

The e.m.f. E of the battery is balanced by p. d. across 75 cm of a potentiometer wire. For a standard cell of e.m.f. 1.02 V, the balancing length is 50 cm. The value of E is

In an experiment for calibration of voltmeter, standard cell of emf 1.5 V is balanced at 300 cm length of potentiometer wire. The P.D. Across a resistace in the circuit is balanced at 1.25 m. if a voltmeter, it reads 0.65 V. The error I te volt meter is

An ammeter A of finite resistance, and a resistor R are joined in series to an ideal cell C . A potentiometer P is joined in parallel to R . The ammeter reading is I_(0) and the potentiometer reading is V_(0) . P is now replaced by a voltmeter of finite resistance. The ammeter reading now is I and the voltmeter reading is V .

An ammeter A of finite resistance , and a resistor R are joined in series to an idel cell C.A potentiometer P is joined in parallel to R. The ammeter reading is I_(0) and the potentiometer reading is V_(0) . P is now replaced by a voltmeter of finite resistance . The ammeter reading now is I and the voltmeter eading is V.

In the given circuit the readings of the voltmeter V_(1) and the ammeter A are .

A Daniel cell is balanced on 125 cm length of a potentiometer wire. Now the cells is short-circuited by a resistance 2 ohm and the balance is obtained at 100 cm . The internal resistance of the Dainel cell is

What resistance should be connected in series with a 0.5 A ammeter to convert it into a 15 V voltmeter ? Given that the resistance of ammeter.

If the resistance R_(1) is increased how will the reading of the ammeter and voltmeter change