Should the resistance of an ammeter be low or high? Give reason.
Should the resistance of an ammeter be low or high? Give reason.
It should be as close to zero as possible. Ideally it should be zero ohm. If it is non-zero and substantial it will affect the true current.
Similar Questions
$A$ hot plate of an electric oven, connected to a $200 \,V$ line. It has two resistance coils $A$ and $B$ each of the $30\, \Omega$ which may be used separately, in series or in parallel. Find the value of the current required in each of the three cases.
$A$ hot plate of an electric oven, connected to a $200 \,V$ line. It has two resistance coils $A$ and $B$ each of the $30\, \Omega$ which may be used separately, in series or in parallel. Find the value of the current required in each of the three cases.
In the circuit diagram shown, the two resistance wires $A$ and $B$ are of same length and same material, but $A$ is thicker than $B .$ Which ammeter $A_{1}$ or $A_{2}$ will indicate higher reading for current ? Give reason.
In the circuit diagram shown, the two resistance wires $A$ and $B$ are of same length and same material, but $A$ is thicker than $B .$ Which ammeter $A_{1}$ or $A_{2}$ will indicate higher reading for current ? Give reason.
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ a heavy current passes through it for about $30$ seconds.
What is meant by "electrical resistance" of a conductor ? State how resistance of a conductor is affected when $(i)$ a low current passes through it for a short duration; $(ii)$ a heavy current passes through it for about $30$ seconds.
What is the device (meter) to measure electric potential difference called?
What is the device (meter) to measure electric potential difference called?
Give an example of a metal which is the best conductor of heat.
Give an example of a metal which is the best conductor of heat.