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Twelve wires, each of resistance r ohms are connected in the form of a skeleton cube. Find the equivalent resistance of the cube when the current enters at one corner and leaves at the diagonally opposite corner
Two parallel resistances 4 Ω and 8 Ω are connected with a known resistance of 6 Ω as shown in figure. Where is the balance point on the wire of the meter bridge?
A heater connected to a 220V supply draws a current of 3A. After 5 s the current drawn by it becomes 2.2 A. If the initial temperature of the heater is 27°C find its steady temperature. Temperature coefficient of resistance of the material of heater element is 0.00017°C–1.
Obtain the total resistance between the terminals A and B of the given network
Calculate the current shown by ammeter A is the circuit diagram given below
A wire or resistance 1000 Ω and length l is increased to twice its original length. Calculate its new resistance.
Three resistance R1, R2 and R3 are connected to a battery of 12 V as shown in figure Calculate the heat produce in each of three resistors in two minutes.
In the given circuit AB is a uniform wire of 10 W and length 1 m. It is connected to series arrangment of cell E1 of e.m.f 2 V and negligible internal resistance and a resistor R. Terminal A is also connected to an electrochemical cell E2 of e.m.f 100 m V and galvanometer G. In this set up a balancing point is obtaiend at 40 cm mark from A. Calculate the resistance of R. If E2 were to have an e.m.f of 300 mV where will you expect the balancing point to be?
