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प्रश्न
SI unit of resistance is:
विकल्प
mho
joule
ohm
ohm meter
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उत्तर
ohm
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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.
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
A wire of resistance 9 ohm having length 30 cm is tripled on itself. What is its new resistance?
How would you connect two resistors in series? Draw a diagram. Calculate the total equivalent resistance.
State the limitations of Ohm’s law.
Draw a neat diagram for the verification of Ohm’s law by voltmeter-ammeter method. By another diagram show the relation between p.d. and current.
Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.
Explain the equivalent resistance of a parallel resistor network.
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1 mm. Conductor B is a hollow tube of outer diameter 2 mm and inner diameter 1 mm. Find the ratio of resistance RA to RB.
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.
- Calculate the current.
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.
