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प्रश्न
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?
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उत्तर
Ohm's law is true only if the temperature of the conductor is constant.
संबंधित प्रश्न
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
Name the unit of electrical resistance and give its symbol.
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.
Fill in the following blank with suitable words:
Resistance is measured in .............. The resistance of a wire increases as the length ..............; as the temperature ..............; and as the cross-sectional area .............. .
Four resistances of 16 ohms each are connected in parallel. Four such combinations are connected in series. What is the total resistance?
State Ohm’s law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.
- Draw a V-I graph for a conductor obeying Ohm’s law.
- What does the slope of V–I graph for a conductor represent?
The filament of a bulb takes a current 100 mA when potential difference across it is 0.2 V. When the potential difference across it becomes 1.0 V, the current becomes 400 mA. Calculate the resistance of filament in each case and account for the difference.
What is meant by the drift speed of free electrons?
State and define Ohm’s law.
What is non-ohmic resistor?
What is ohmic device?
The slope of voltage (V) versus current (I) is called:
Let the resistance of an electrical device remain constant, while the potential difference across its two ends decreases to one fourth of its initial value. What change will occur in the current through it? State the law which helps us in solving the above stated question.
Resistance (R) in a conductor is best described as:
Which of the following is an example of a Non-Ohmic material?
Which formula is used with Ohm's Law to help determine power consumption in an electrical circuit?
