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

Which of the following is not a homogenous function of $$x$$ and $$y$$

A
$$ \sin x-\cos y $$
B
$$ \cos ^2\left(\frac{y}{x}\right)+\frac{y}{x} $$
C
$$ x^2+2 x y $$
D
$$ 2 x-y $$
2
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The resistance of the galvanometer and shunt of an ammeter are $$90 \mathrm{~ohm}$$ and $$10 \mathrm{~ohm}$$ respectively, then the fraction of the main current passing through the galvanometer and the shut respectively are:

A
$$\frac{1}{90}$$ and $$\frac{1}{10}$$
B
$$\frac{1}{10}$$ and $$\frac{1}{90}$$
C
$$\frac{1}{10}$$ and $$\frac{9}{10}$$
D
$$\frac{9}{10}$$ and $$\frac{1}{10}$$
3
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A glass of hot water cools from $$90^{\circ} \mathrm{C}$$ to $$70^{\circ} \mathrm{C}$$ in 3 minutes when the temperature of surroundings is $$20^{\circ} \mathrm{C}$$. What is the time taken by the glass of hot water to cool from $$60^{\circ} \mathrm{C}$$ to $$40^{\circ} \mathrm{C}$$ if the surrounding temperature remains the same at $$20^{\circ} \mathrm{C}$$ ?

A
15 minutes
B
6 minutes
C
12 minutes
D
10 minutes
4
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

When two objects are moving along a straight line in the same direction, the distance between them increases by $$6 \mathrm{~m}$$ in one second. If the objects move with their constant speed towards each other the distance decreases by $$8 \mathrm{~m}$$ in one second, then the speed of the objects are :

A
$$14 \mathrm{~ms}^{-1}$$ and $$2 \mathrm{~ms}^{-1}$$
B
$$7 \mathrm{~ms}^{-1}$$ and $$1 \mathrm{~ms}^{-1}$$
C
$$3.5 \mathrm{~ms}^{-1}$$ and $$2 \mathrm{~ms}^{-1}$$
D
$$3.5 \mathrm{~ms}^{-1}$$ and $$1 \mathrm{~ms}^{-1}$$
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