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प्रश्न
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
उत्तर
Current (I) = 1.2 A
Potential Difference/Voltage (V) = 6.0 V
Resistance (R) = ?
According to Ohm's Law:
V = IR
Then R = `"V"/"I"`
R = `6/1.2`
R = 5 Ω
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संबंधित प्रश्न
The relationship between the potential difference and the current in a conductor is stated in the form of a law.
1) Name the law.
2) What does the slope of V-I graph for a conductor represent?
3) Name the material used for making the connecting wire.
What is Resistivity?
The graph between V and I for a conductor is a straight line passing through the origin.
What should remain constant in a statement of this law?
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
How much energy is consumed when a current of 5 amperes flows through the filament (or element) of a heater having resistance of 100 ohms for two hours? Express it in joules.
What is meant by the drift speed of free electrons?
The ratio of the potential difference to the current is known as ________.
A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true?
State Ohm’s law? How can it be verified experimentally? Does it hold good under all conditions? Comment.
