What will be the value of resistance in ideal diode?

an ideal diode

The resistance of a potentiometer wire is 10 Omega and its length is 10 meter. A resistance box and 2 V accumulator are placed in series with it. What should be the value of resistance in the box if it is desired to have potential drop of 1muV /mm?

In a meter bridge experiment, the unknown resistance X in the left gap and a known resistance of 60 Omega in right gap, null point is obtained at l cm from left. If the unknown resistance X is shunted by an equal resistance, what should be the value of known resistance in the right gap in order to get the null point at the same place?

What is the unit of resistivity.

What is the value of shunt resistance required to convert a galvanometer of resistance 100 Omega into an ammeter of range 1A ? (Given : Full scale deflection of the galvanometer is 5 mA.)

a p-n junction diode when forward biased has a drop of 0.4 V which is assumed to be independent of currebnt A. a current excess of 10mA through the diode damages (burns) the diode .if we want to use a 2 V battrey to forwqard bias the diode, what should be the avlue of resistor used in series with the diode so thatthe maximum current does NOT exced 5mA?

What is the value of the shunt resistance that allows 20% of the main current through a galvanometer of 99 Omega ?.

Heat energy is being produced in a resistance in a cricuit at the rate of 100 W.The current of 3 A is flowing in the circuit.What must be the value of the resistance?

What is the SI unit of resistivity?