1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A cup of coffee cools from 90$$^\circ$$C to 80$$^\circ$$C in t minutes, when the room temperature is 20$$^\circ$$C. The time taken by a similar cup of coffee to cool from 80$$^\circ$$C to 60$$^\circ$$C at a room temperature same at 20$$^\circ$$C is :
A
$${5 \over {13}}$$t
B
$${13 \over {10}}$$t
C
$${13 \over {5}}$$t
D
$${10 \over {13}}$$t
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
The equivalent capacitance of the combination shown in the figure is :

NEET 2021 Physics - Capacitor Question 12 English
A
3C/2
B
3C
C
2C
D
C/2
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.
A
[F] [A$$-$$1] [T]
B
[F] [A] [T]
C
[F] [A] [T2]
D
[F] [A] [T$$-$$1]
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n $$-$$ 1 to t = n. The the ratio $${{{S_n}} \over {{S_{n + 1}}}}$$ is :
A
$${{2n} \over {2n - 1}}$$
B
$${{2n - 1} \over {2n}}$$
C
$${{2n - 1} \over {2n + 1}}$$
D
$${{2n + 1} \over {2n - 1}}$$
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