Ammeter

Q.

Ammeter is used to measure

1. Voltage

2. Current

3. Resistance

4. None of these

Q. Ammeter is always connected in ___ and Voltmeter is always connected in___.

1. series, series
2. parallel, series
3. parallel, parallel
4. series, parallel

Q.

Which terminal of an ammeter is connected to positive?

Q.

Why should an ideal voltmeter have infinite resistance, and an ideal ammeter has no resistance?

Q.

Five resistors are connected in circuit as shown with a 3 V battery. Find the ammeter reading.

1. 1 A
2. 2 A
3. 3 A
4. 4 A

Q.

There are $n$ exactly identical resistors each having resistance $R$. If the resultant resistance when joined in parallel is $\lambda$, then in series the resistance will come out to be

1. $\frac{\lambda }{n^2}$

2. $n^2\lambda$

3. $\frac{\lambda }{n^3}$

4. $n^3\lambda$

Q.

Find the value of $‘I^{\prime }$ for the following circuit.

1. $1A$

2. $10A$

3. $\frac{1}{16}A$

4. $\frac{1}{8}A$

Q. What is an ammeter? How is it connected in a circuit? Draw a diagram to illustrate your answer.

Q.

What is the resistance of the ammeter and voltmeter?

Q. Eight identical resistors, each of resistance $r$, are connected along edges of a pyramid having square base ABCD as shown in the figure. Calculate equivalent resistance
(a) between A and D
(b) between A and O

Q.

The resistance of an ammeter should always be low.

1. True

2. False

Q.

For the network shown in the figure, what is the effective resistance between A and B ?

1. $5\Omega$

2. $10\Omega$

3. $15\Omega$

4. $20\Omega$

Q. A certain circuit with resistance, R=100 ohm is powered by a direct current source. An ammeter with an internal resistance 1 ohm is connected to the circuit to measure the current.what was the current in the circuit before the ammeter was connected if the ammeter shows 5 ampere?

Q.

An ammeter is connected in a circuit in

1. series

2. parallel

3. either in series or in parallel

4. Depends on the type of circuit required

Q. Which of the following device can measure both the magnitude and direction of electric current in an electric circuit?

1. Voltmeter
2. Ammeter
3. Galvanometer
4. Potentiometer

Q.

Which device is used to measure current?

1. Voltmeter

2. Ammeter

3. Galvanometer

4. Odometer

Q.

The device which is used to measure electric current through a circuit is called a/an ____.

1. Ammeter

2. Wattmeter

3. Voltmeter

4. Ohmmeter

Q.

Five resistors are connected in circuit as shown with a 3 V battery. Find the ammeter reading.

1. 1 A
2. 2 A
3. 3 A
4. 4 A