Physics - Online Test

In Series LCR Circuit, current is same across all elements. Since for a resistor both current and voltage are in same phase, Vc is along the same direction as current in the phasor diagram.

In capacitor voltage lags current by 900 so it is at right angle with VR and in an inductor voltage leads current by 900 so it is at right angle with VR and directly opposite to Vc

According to Pascal's Law,

Pressure applied to any point inside the liquid is trnasmiteed equally in all direction so,

Pressure applied on the smaller cylinder is equal to the pressure on the other cylinder,which is given by

F1A1=F2A2

So,

Maximum force on the other side is ,

F2 = A2A1×F1

Collision by moleculeto the wall of conntainer assumed to be perfectly elastic.

By the principle of conservation of momentum, the momentum imparted to the wall in the collision = 2mvx 

So the magnitude of the force on the wall from each collision is 

F=2mvxΔt

distance travelled in time Δt

$x=vxΔt$

x=

When the batteries are in series, the internal resistances are in series. Both e m f and the internal resistances add up.

I=E(r+R)1=3(2r+R)....(i)

0.6=1.5(r2+R)....(ii)

from equation (i) and (ii)

r=13Ω