Physics (Sample Exam)
10:00
Q. 1
A transistor is used in common emitter configuration. Given its
= 0.9, calculate the change in collector current when the base current changes by 2
A.
1.
1
A
2.
9
A
3.
30
A
4.
18
A
Q. 2
In the relation V =
where the symbols have their usual meanings, the dimensions of V are :
1.
[M
O
L
3
T
O
]
2.
[M
0
L
3
T
-1
]
3.
[M
O
L
-3
T]
4.
[ML
3
T
0
]
Q. 3
If
, then the vector in the direction of
and having magnitude as |
|, is:
1.
2.
3.
4.
Q. 4
A body falls from a height of 1000 m with zero initial velocity. Simultaneously, another body falls from a certain height with an initial velocity of 7 m/s. The two bodies reach the ground at the same time. What is the initial height of the second body ?
1.
1100 m
2.
1400 m
3.
1700 m
4.
1900 m
Q. 5
A particle is moving along a straight line path according to the relation
s
2
= at
2
+ 2bt + c
s represents the distance travelled in time t seconds, a, b and c are constants. Then, the acceleration of the particle varies as
1.
s
-3
2.
s
1/2
3.
s
3/2
4.
s
2