CBSE
Multiple Choice QuestionsFor a common-emitter transistor, input current is 5A, ( β = 100 circuit is operated at load resistance of 10 kΩ, then voltage across collector emitter will be
5 V
10 V
12.5 V
7.5 V
Assertion: Photodiode and photovoltaic cell are based on the same principle.
Reason: Both use same method of operations to work.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: At a fixed temperature, silicon will have a minimum conductivity when it has a smaller acceptor doping.
Reason: The conductivity of an intrinisic semiconductor is slightly higher than that of a lightly doped p-type
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion: Electric appliances with metallic body. e.g., heaters, presses etc., have three pin connections, whereas an electric bulb has a two pin connection.
Reason: Three pin connections reduce heating of connecting cables.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: A pure semiconductor has negative temperature coefficient of resistance.
Reason: On raising the temperature, more charge carriers are released, conductance increases and resistance decreases.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
When the inputs of a two input logic gate are 0 and 0, the output is 1. When the inputs are 1 and 0, the output is zero. The type of logic gate is
XOR
NAND
NOR
OR
The logic gate represented in the following figure is
OR gate
NOT gate
NAND gate
XOR gate
Assertion: Transistor can be used as a switch.
Reason: Both linear and non-linear voltage bias dependence occurs in it.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Direction of electric field in P-N junction diode is
from P-side to N-side
From N-side to P-side
randomly oriented
electric field does not exist
Which of the following current must be zero in an unbiased PN junction diode?
Current due to majority charge carriers (both electrons and holes).
Current due to minority charge carriers (both electrons and holes).
Current due to majority and minority charge carriers
Current due to majority and minority charge carriers (only holes).
