I am bcd candidate what is percentage that I should get in 12th for jee mains

The energy dissipiated by a resistor is 10 mJ in 1s when an electric current of 2mA flows through it. The resistance is _______ (rounded off to the nearest integer)
Option: 1 2500
Option: 2 3000
Option: 3 400
Option: 4 5000

In a parallel plate capcitor set up, the plate area of capacitor is 2m² and the plates are separated by 1m. If the space between the plates are filled with a dielectric material of thickness 0.5m and area 2m² (see fig) the capacities of the set-up will be _____ . (Dielectric constant of material =3.2)  (rounded off to the nearest integer)
Option: 1 3
Option: 2 4
Option: 3 5
Option: 4 6

A swimmer can swin with velocity of 12km/h in still water. Water flowing in a river has velocity 6km/h. The direction with respect to the direction of flow of river water he should swim in order to reach the point on the other bank just opposite to his starting point is ____________   (Rounded off to the nearest integer)
Option: 1 120
Option: 2 40
Option: 3 50
Option: 4 60

For an ideal heat engine,the temperature of the source is . In order to have 60% efficiency the temperature of the sink should be __________  (Rounded off to the nearest integer)
Option: 1 -113
Option: 2 12
Option: 3 18
Option: 4 17

A closed organ pipe of length L and an open organ pipe contain gases of densities  respectively. The compressebility of gases are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is  where x is ________ (Rounded off to the nearest integer)
Option: 1 4
Option: 2 5
Option: 3 6
Option: 4 7