Advertisements
Advertisements
प्रश्न
Write an expression for calculating electrical power in terms of current and resistance.
Advertisements
उत्तर
Electrical power in terms of current and resistance is P = I2R.
संबंधित प्रश्न
The V-I graph for a series combination and for a parallel combination of two resistors is shown in the figure below. Which of the two A or B. represents the parallel combination? Give reasons for your answer.
How does the resistance of a pure metal change if its temperature decreases?
How does the presence of impurities in a metal affect its resistance?
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
State the effect of rise in temperature on the resistance of semi-conductors.
What is a resistance? Define it with respect to Ohm’s law,
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
Draw a labelled circuit diagram showing the above arrangement.
The resistance of two resistors joined in series is 8Ω and in parallel is 1.5Ω. Find the value of the two resistances.
Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of 4 Ω.
