Advertisements
Advertisements
प्रश्न
Why should an ammeter have low resistance?
Advertisements
उत्तर
An ammeter has a low resistance, which makes it easy for all the current to flow through the circuit without energy loss from heat losses. This means that it does not impede or alter the flow of electric current.
APPEARS IN
संबंधित प्रश्न
Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
What is an Ohmic resistor?
What length of copper wire of resistivity 1.7 × 10-8 Ω m and radius 1 mm is required so that its resistance is 2Ω?
In the circuit shown in the figure, find the total resistance of the circuit and the current in the arm AD.

Calculate the effective resistance across AB?

State and define Ohm’s law.
State macroscopic form of Ohm’s law.
The heat produced by a 100 w heater in 2 minute is equal to
Two cells of same emf E but internal resistance r1 and r2 are connected in series to an external resistor R (Figure). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero.
