Home
Class 12
PHYSICS
An ammeter of resistance R is to be used...

An ammeter of resistance `R` is to be used to measure the current through a resistance `r`, in which case, the reading wili be nearest to the current in the absence of ammeter is

A

`R = oo`

B

`R gt r`

C

`R lt r`

D

`R = r`.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A voltmeter of resistance R is to be used to measure the potential difference across a resistance r . The nearest reading in the absence of voltmeter ?

An external resistance R is connected to a cell of internal resistance r . The current in the circuit is maximum when :

Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure potential difference across the 12 Omega resistor. What would be the readings in the ammeter and the voltmeter?

An external resistance R is connected to a cell of internal resistance r. The current in the circuit is maximum when :

Three similar cells, each of emf 2 V and internal resistance r Omega send the same current through an external resistance of 2 Omega when connected in series or in parallel. The strength of the current flowing through the external resistance is (A)

To decrease the range of an ammeter its resistance need to be increased. An ammeter has resistance R_0 and range I . Which of the following resistance can be connected in series with it to decrease its range to I/n .

The current passing through the ideal ammeter in the circuit given below is

The current passing through the ideal ammeter in the circuit given below is