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प्रश्न
State the effect of rise in temperature on the resistance of semi-conductors.
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उत्तर
In the case of semi-conductors like carbon, silicon, germanium, etc., the resistance decreases with increase in temperature.
संबंधित प्रश्न
If the equivalent resistance is to be increased, then the number of resistances should be connected in
- Series
- Parallel
- Mixed arrangement
- None of the above
Give one example to show how the resistance depends on the nature of material of the conductor.
Name the following substances:
(i) Showing low resistivity,
(ii) Showing very high resistivity,
(iii) Showing moderate resistivity.
Calculate the equivalent resistance of the following combination of resistor r1, r2, r3, and r4
Three resistors of 6.0 Ω, 2.0 Ω and 4.0 Ω are joined to an ammeter A and a cell of emf 6.0 V as shown in the following figure. Calculate :
- the effective resistance of the circuit.
- the reading of ammeter.
Choose the correct alternative and rewrite the following sentence.
If three resistors 2 ohms, 3 ohms and 4 ohms are connected in series, then the effective resistance in the circuit will be _______ ohms.
How does the resistance of an alloy, vary with temperature?
How does the resistivity of an alloy such as constantace depends on temperature.
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
Consider the following combinations of resistors:
The combinations having equivalent resistance 1 Q is/are ______.
