Which of the following statements is not true, regarding the electrical set-up for verification of Ohm's law?

The voltmeter is connected in parallel with the known resistance.

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The ammeter is connected in series in the circuit.

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The rheostat can only increase the resistance in the circuit.

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The key is used to switch on/off electric current in the circuit.

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Solution

The correct option is C
The rheostat can only increase the resistance in the circuit.

A rheostat is a device which can provide us with the variable resistance. It means it can increase or decrease the value of resistance in the circuit.

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Similar questions

For carrying out the experiment, on finding the equivalent resistance of two resistors connected in series, a student sets up the circuit as shown. On further verification, he finds out that the circuit has one or more of the following faults:

(i) The resistors R₁ and R₂ have not been correctly connected in series

(ii) The voltmeter has not been correctly connected in the circuit

(iii) The ammeter has not been correctly connected in the circuit

Out of these three, the actual fault in the circuit is/are:

Q. In an electrical circuit containing a source of emf and a load resistance, the voltmeter is connected by mistake in series with the load across the source and ammeter is connected parallel to the load. Then which meter burns out ?

Q. Choose the appropriate set of apparatus for performing the experiment to determine the equivalent resistance of two resistors when connected in series:
(1) Voltmeter, Ammeter, Two resistors, Key, Battery
(2) Ammeter, Two resistors, Key, Connecting wires, Rheostat, Battery
(3) Key, Rheostat, Voltmeter, Two resistors, Battery, Connecting wires
(4) Battery, Ammeter, Connecting wires, Rheostat, Voltmeter, Two resistors, Key

Which statement is /are correct?
1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel.
2. An ammeter has a high resistance.
3. A voltmeter has a low resistance.

Q. Assertion : Out of galvanometer, ammeter and voltmeter, resistance of ammeter is lowest and resistance of voltmeter is highest
Reason : An ammeter is connected in series and a voltmeter is connected in parallel, in a circuit

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Which of the following statements is not true, regarding the electrical set-up for verification of Ohm's law?

The correct option is C The rheostat can only increase the resistance in the circuit. A rheostat is a device which can provide us with the variable resistance. It means it can increase or decrease the value of resistance in the circuit.

The correct option is C
The rheostat can only increase the resistance in the circuit.

A rheostat is a device which can provide us with the variable resistance. It means it can increase or decrease the value of resistance in the circuit.