1
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The acceleration due to gravity on the earth’s surface at the poles is g and angular velocity of the earth about the axis passing through the pole is $$\omega $$. An object is weighed at the equator and at a height h above the poles by using a spring balance. If the weights are found to be same, then h is (h << R, where R is the radius of the earth)
A
$${{{R^2}{\omega ^2}} \over {2g}}$$
B
$${{{R^2}{\omega ^2}} \over g}$$
C
$${{{R^2}{\omega ^2}} \over {8g}}$$
D
$${{{R^2}{\omega ^2}} \over {4g}}$$
2
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found to be n times the initial pressure. The value of n is :
A
128
B
32
C
326
D
$${1 \over {32}}$$
3
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An iron rod of volume 10–3 m3 and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod will be :
A
5 $$ \times $$ 102 Am2
B
0.5 $$ \times $$ 102 Am2
C
500 $$ \times $$ 102 Am2
D
50 $$ \times $$ 102 Am2
4
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In the circuit shown, charge on the 5 $$\mu $$F capacitor is :

JEE Main 2020 (Online) 5th September Evening Slot Physics - Capacitor Question 100 English
A
5.45 $$\mu $$C
B
18.00 $$\mu $$C
C
10.90 $$\mu $$C
D
16.36 $$\mu $$C
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