(Due) nt while verifying Ohm's law calculated the value of resistance of the CC Or the resistor for each set of observation. However, the values of resistance were er, the values of resistance were slightly different from the actual value. Is his experiment wrong? Justify your answer. want is correct cinco come of the current is utilized to u

A student while verifying Ohm's law calculated the value of resistance of the resistor for each set of observation .However, the values of resistance were slightly different from the actual value . Is his experiment wrong ? Justify your answer.

A student while verifying Ohm's law calculated the value of resistance of the resistor for each set of observation .However, the values of resistance were slightly different from the actual value . Is his experiment wrong ? Justify your answer.

In ohm's experiment, the values of unknown resistances were found to be 6.12 Omega , 6.15 Omega , calculate the mean absolute error, relative error and percentage error in these measurements.

In the experiment of verification of Ohm's law the error in the current measurement is 1%, while that in the voltage measurement is 2%. The error in the resistance has a maximum value of

In the experiment of verification of Ohm's law the error in the current measurement is 1%, while that in the voltage measurement is 2%. The error in the resistance has a maximum value of

(a) What is the ratio of potential difference and current known as? (b) The values of potential difference V applied across a resistor and the corresponding values of current I flowing in the resistor are given below: {:("Potential difference"V("in volts"),:,2.5,5.0,10.0,15.0,20.0,25.0),("Current,I"("in amperes"),:,0.1,0.2,0.4,0.6,0.8,1.0):} Plot a graph between V and I, and calculate the resistance of the resistor. (c) Name the law which is illustrated by the above V-I graph. (d) Write down the formula which states the relations between potential difference, current and resistance. (d) The potential difference between the terminals of an electric iron is 240V and the current is 5.0A. What is the resistance of the electric iron?

A set of n equal resistors, of value R each, are connected in series to a battery of emf E and internal resistance R. The current drawn is I. Now, the n resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of n is

Read the following paragraph and answer the questions given below it: The resistance of a metal falls when cooled below room temperature. Many scientists believed that the value of the resistance would become constant at some very low temperature, allowing the current to flow with little or no resistance. H. K. Onnes successfully liquefied helium in 1908 by cooling it to about 4 K. In 1911, while investigating the electrical property of very pure mercury. Onnes discovered that at a temperature of 4.2 kelvin, its resistance practically vanished. This new state, on account of its extraordinary property, is now called the superconducting state and the phenomenon is called superconductivity. A superconductor, below a certain critical temperature, offers almost zero resistance to a flow of current through it. Onnes also discovered that a superconductor exhibits persistent current: once set up, the current continues to flow for a very long time without an electric potential difference driving it and without significant loss. Superconductivity is used in many diverse areas, such as magnetically levitated trains, transmission of electricity, increasing speed of computers, in MRI (magnetic resonance imaging). At what temperature does the resistance of very pure mercury become almost zero?

Read the following paragraph and answer the questions given below it: The resistance of a metal falls when cooled below room temperature. Many scientists believed that the value of the resistance would become constant at some very low temperature, allowing the current to flow with little or no resistance. H. K. Onnes successfully liquefied helium in 1908 by cooling it to about 4 K. In 1911, while investigating the electrical property of very pure mercury. Onnes discovered that at a temperature of 4.2 kelvin, its resistance practically vanished. This new state, on account of its extraordinary property, is now called the superconducting state and the phenomenon is called superconductivity. A superconductor, below a certain critical temperature, offers almost zero resistance to a flow of current through it. Onnes also discovered that a superconductor exhibits persistent current: once set up, the current continues to flow for a very long time without an electric potential difference driving it and without significant loss. Superconductivity is used in many diverse areas, such as magnetically levitated trains, transmission of electricity, increasing speed of computers, in MRI (magnetic resonance imaging). Name the scientist who discovered superconductivity.