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प्रश्न
Tick(✓) the correct choice in the following:
Ohm's law is applicable to
विकल्प
Discharge of electricity through gases
Diode value
All metallic conductors
Carbon compounds
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उत्तर
All metallic conductors
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संबंधित प्रश्न
The unit of electrical resistance is:
(a) ampere
(b) volt
(c) coulomb
(d) ohm
The graph between V and I for a conductor is a straight line passing through the origin.
- Which law is illustrated by such a graph?
- What should remain constant in a statement of this law?
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.
How would you connect two resistors in series? Draw a diagram. Calculate the total equivalent resistance.
Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of 1 A.
The resistivity of copper = 1.7 × 10–8 Ω m
How does an increase in the temperature affect the specific resistance of a semiconductor?
What are ohmic conductors? Give one exmaple. Draw a graph showing the current-voltage relationship for an ohmic conductor.
What are non-ohmic conductors? Give one exmaple. Draw a current-voltage graph for a non-ohmic conductor.
The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount of heat produced in the resistor will become ______.
When two conductors at different electric potentials are joined by a metallic wire, in which direction do the electrons flow?
