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प्रश्न
The unit of electrical resistance is:
(a) ampere
(b) volt
(c) coulomb
(d) ohm
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उत्तर
(d) ohm
The unit of electrical resistance is ohm.
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संबंधित प्रश्न
Graph showing the variation of current versus voltage for a material Ga As is shown in the figure. Identify the region of
(i) negative resistance
(ii) where Ohm's law is obeyed.
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Draw a labelled circuit diagram to verify this relationship.
Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition. Based on their demonstrated circuit, answer the following questions.
- State what happens when switch A is connected to:
a) Position 2
b) Position 3 - Find the potential difference across each lamp when lit.
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a) in each 12 Ω lamp when lit.
b) In each 4 Ω lamp when lit.
OR - Show, with calculations, which type of lamp, 4.0 Ω or 12 Ω, has the higher power.
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| Voltage (V) | 10 V | 20 V | 30 V |
| Current (I) | 2 A | 3 A | 4 A |
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- State whether the conductor used is ohmic or non-ohmic.
- Justify your answer.
- State Ohm's law.
