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Tutorial based on Current | ohm's law and resistance

(a) With the help of a circuit diagram, deduce the equivalent resistance of two resistances connected in series. (b) Two resistances are connected in series as shown in the diagram: (i) What is the current through the 5 ohm resistance? (ii) What is the current through R? (iii) What is the value of R? (iv) What is the value of V?

S.I. unit of specific resistance is

Draw the circuit diagram to verify Ohm's Law with the help of a main resistance of 100 Omega and tow galvanometer of resistance 10^6 Omega and 10^(-3)Omega and a source of varying emf. Show the correct positions of volmeter and ammeter.

(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. (b) In the circuit diagram shown below, find: (i) Total resistance. (ii) Current shown by the ammeter A