The symbol to the right represents what electronic component? a) PNP Bipolar Jun

Question

The symbol to the right represents what electronic component? a) PNP Bipolar Junction Transistor b) NPN Bipolar Junction Transistor c) N-Channel Enhancement Mode FET d) P-Chanel Depletion Mode FET Which statement below best describes the function of a Bipolar Junction Transistor? a) It is a variable resistor. b) It is a voltage amplifier. c) It is a current amplifier. d) It is a variable capacitor. Given the transistor below, what is the emitter current if the collector current is 10 mA and the base current is 40 mu A? a) 9.96 mA b) 10.0 mA c) 10.04 mA d) 10.4 mA What is the gain (beta_dc) of the transistor of question 35? a) 248 b) 249 c) 250 d) 251 Given the collector characteristics for an NPN BJT below, what is the value of beta_dc? a) 20 b) 100 c) 140 d) 200

Explanation / Answer

33)

In the given symbols we can observe that the fourth terminal substrate is connected to the ground and the continuous thick line connected between the drain and source terminal represents the depletion type. The arrow symbol indicates the type of P-channel,hence it is called P- channel depletion MOSFET

34) BJT is used as current amplifier becuase it is current control device that is output current is controlled by input current

35) IE = IC + IB

=10*10-3+ 40*10-6

=10.04 mA

36) Beta = IC/IB

= 10*10-3/ 40*10-6

=250

37) Beta = IC/IB

= 20*10-3/ 100*10-6

=200

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