Forward Bias

Q. Consider the junction diode is idea. The value of current in the figure is

1. zero
2. 10^–1 A
3. 10^–3 A
4. 10^–2 A

Q. The current I through 10 $\Omega$ resistor in the circuit shown in figure.

1. 50 mA
2. 40 mA
3. 80 mA
4. 35 mA
5. 20 mA

Q.

1. 4.3 kW

2. 860 kW

3. 4.3 W

4. 860 W

Q.

In the circuit given below, the value of the current is

1. 0 amp

2. 
   

3. 
   

4. 
   

Q.

Two PN-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be [IIT-JEE 1989]

1. In the circuit (2) and (3)

2. In the circuit (1) and (2)

3. In the circuit (1) and (3)

4. Only in the circuit (1)

Q.

A 2V battery is connected across the points A and B as shown in the figure given below. Assuming that the resistance of each diode is zero in forward bias and infinity in reverse bias, the current supplied by the battery when its positive terminal is connected to A is

1. 0.1A

2. 0.2A

3. Zero

4. 0.4A

Q.

If the following input signal is sent through a PN-junction diode, then the output signal across R_L will be

1. 
   

2. 
   

3. 
   

4. 
   

Q.

In the forward bias arrangement of a PN-junction diode

1. The N-end is connected to the positive terminal of the battery

2. The P-end is connected to the positive terminal of the battery

3. The direction of current is from N-end to P-end in the diode

4. The P-end is connected to the negative terminal of battery

Q.

In the circuit, if the forward voltage drop for the diode is 0.5V, the current will be

1. 3.4 mA

2. 2 mA

3. 2.5 mA

4. 3 mA

Q.

If the forward voltage in a semiconductor diode is doubled, the width of the depletion layer will

1. Become half

2. Become one-fourth

3. Remain unchanged

4. Become double