1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The conductivity of a semiconductor increases with increase in temperature because

A) number density of free current carriers increases

B) relaxation time increases

C) both number density of carriers and relaxation time increase

D) number density of current carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density

A
C
B
D
C
A
D
B
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Four resistors, each of resistance R, are connected as shown in the figure below.

COMEDK 2024 Evening Shift Physics - Current Electricity Question 17 English

A
The total resistance between points 1 and 3 is 0.5 R.
B
The total resistance between points 1 and 6 is $$3.5 \mathrm{R}$$.
C
The total resistance between points 3 and 6 is 2 R.
D
The total resistance between points 2 and 4 is $$0.5 \mathrm{~R}$$.
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the $$\mathrm{A} . \mathrm{C}$$. circuit given below, voltmeters $$\mathrm{V}_1$$ and $$\mathrm{V}_2$$ read $$100 \mathrm{~V}$$ each. Find the reading of the voltmeter $$\mathrm{V}_3$$ and the ammeter $$\mathrm{A}$$.

COMEDK 2024 Evening Shift Physics - Alternating Current Question 12 English

A
220 V, 2 A
B
110 V, 2 A
C
110 V, 4 A
D
220 V, 1 A
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Joule second is the unit of

A
Energy
B
Power
C
Angular momentum
D
Linear momentum
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