Home
Class 12
PHYSICS
A voltmeter, an ammeter and a resistance...

A voltmeter, an ammeter and a resistance are connected in series with a lead accumulator. The voltmeter gives some deflection but the deflection of ammeter is almost zero. Explain why?

Text Solution

Verified by Experts

Voltmeter resistance being very high, when connected in series, it makes the effective resistance of the circuit very high. Due to it, the current in the circuit becomes extremely small. Since ammeter measures the current, hence the deflection of ammeter is almost zero. As voltmeter measures potential difference between the two points, it will show the reading due to voltage of the lead accumulator.
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Conceptual Problems (d)|2 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Very Short Answer Questions (a)|2 Videos

  • ELECTROSTATICS

    PRADEEP|Exercise ASSERTION-REASON TYPE QUESTIONS|2 Videos

  • OPTICS

    PRADEEP|Exercise Multiple choice questions|1 Videos

Similar Questions

Explore conceptually related problems

Compare how an ammeter and a voltmeter are connected in a circuit.

A voltmeter can be converted into ammeter by connecting

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.

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

Which of the two is connected in series: ammeter or voltmeter?

A voltmeter and an ammeter are connected in series to an ideal cell of emf E . The voltmeter reading is V , and the ammeter readings is I . Then (i) V lt E (ii) the voltmeter resistance is V// I (iii) the potential difference across the ammeter is E - V (iv) Voltmeter resistance + ammeter resistance = E//I Correct statements are

An ammeter and a voltmeter of resistance R are connected in series to an electric cell of negligible internal resistance . Their readings are A and V respectively. If another resistance R is connected in parallel with the voltmeter , then

The hot wire ammeter A in Fig. shows some deflection, but not in Fig. Why ?