Quiz masters round 3

The collector current of a BJT increases by 2% for every 10°C rise in temperature. If the collector current at 25°C is 1 mA, what will be the collector current at 55°C?

• 1.06
• 0
• 2.0
• 3.4

What condition will result in a zero deflection of the galvanometer?

• R1 = R2 and R3 = Rx
• R1/R2 = R3/Rx
• R1 + R2 = R3 + Rx
• R1 * R2 = R3 * Rx

What is the effect of positive feedback on the gain of the amplifier?

• Increase gain and stability
• Increase gain but decreases stability
• Decreases gain and decreases stability
• Decreases gain and increases stability

In which region is a BJT operating when the collector current is almost zero?

• Saturation
• Active
• Cut-off
• Reverse saturation

What is the output of a NAND gate with inputs A=0 and B=1?

• 0
• 1
• True
• False

Binary number 1101.101 is equivalent to decimal number?

• 13.5
• 13.75
• 13.625
• 13.875

At a room temperature of 293K, calculate the thermal noise generated by two resistors of 20KΩ and 30 KΩ when the bandwidth is 10 KHz and the resistors are connected in series.

• 300.66 * 10-7
• 684.51 * 10-15
• 284.48 * 10-7
• 206.85 * 10-7

A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω and an output impedance of 200Ω. The power gain of the amplifier is

• 1000
• 1250
• 100
• 500

Find h22 parameters of for the circuit as shown

• -1/2
• 1/2
• 4
• -2

If VA - VB = 6 V then VC -VD is

• 3 V
• -5 V
• 2 V
• 6 V