1
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

A plane requires for take off a speed of 72 kmh$$-$$1, the run on the ground being 50 m. The mass of the plane is 10000 kg and the coefficient of friction between the plane and the ground is 0.2. Assume that the plane accelerates uniformly during take off. The minimum force required by the engine of the plane for take off is

A
4.43 $$\times$$ 104 N
B
5.96 $$\times$$ 104 N
C
2.25 $$\times$$ 104 N
D
3.45 $$\times$$ 104 N
2
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

Given that in a fluorescent lamp's choke, a reverse voltage of 120 V is generated as the choke's current changes steadily from 0.50 A to 0.20 A in a time frame of 0.030 ms. Calculate the self inductance of the choke in millihenrys (mH).

A
12 H
B
12 $$\times$$ 10$$-$$3 mH
C
12 $$\times$$ 10$$-$$3 H
D
0
3
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

If a man becomes a giant, expanding his linear dimensions by a factor of eight, and assuming his density remains unchanged, the factor by which the stress in his legs will increase is

A
$${1 \over 8}$$
B
8
C
36
D
64
4
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1

When 2 moles of a monoatomic gas are mixed with 3 moles of a diatomic gas, the value of adiabatic exponent for the mixture is

A
$${{15} \over {16}}$$
B
$${{7} \over {5}}$$
C
$${{31} \over {21}}$$
D
$${{38} \over {59}}$$
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