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  4. A transistor is preferable to a triode valve when used in amplifier because it (i) can withstand larger changes in temperature (ii) has higher input impedance (iii) can handle larger power (iv) does not require heater. Say, if only

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Q. A transistor is preferable to a triode valve when used in amplifier because it
(i) can withstand larger changes in temperature
(ii) has higher input impedance
(iii) can handle larger power
(iv) does not require heater. Say, if only

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Correct answer is (d) (iv) is correct