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संबंधित प्रश्न
Find the equivalent resistance between points A and B
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
Name a substance of which the resistance remains almost unchanged by the increase in temperature.
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
What potential difference is needed to drive a current o f 1 A through a 5 Ω resistor?
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.
