A person travelling on a straight line moves with an uniform velocity v1 for some time and with uniform velocity v2 for the next equal interval of time. The average velocity for the entire duration is
( v1 + v2 )
(v1 + v2 ) / 2
(v1 + v2 ) / 3
(2v1 + 3v2 ) / 3
Rain drops are spherical in shape, because of
surface tension
capillarity
downward motion
acceleration due to gravity
Volume versus temperature graphs for a given mass of an ideal gas are shown in figure. At two different values of constant pressure, what can be inferred about relation between p1 and p2 ?
p1 > p2
p1 = p2
p1 < p2
data is insufficient
Boyle's law is applicable for an
adiabatic process
isothermal process
isobaric process
isochoric process
The displacement y of a particle in a medium can be expressed as y =10-6 sin (l00t + 20x + / 4) m, where t is in second and x in metre. The speed of the wave is
2000 m/s
5 m/s
20 m/s
5 m/s
B.
5 m/s
If the phase difference between two points is 60° on a wave velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is
1 cm
6 cm
12 cm
24 cm
In a wave motion y = A sin (kx - ωt), y can represent
electric field
magnetic field
displacement
pressure
Two particles A and B of masses m and 2m have charges q and 2q respectively. Both particles moving with velocities v1 and v2 respectively in the same direction and enter the same magnetic field B acting normally to their direction of motion. If the two forces FA and FB acting on them are in the ratio of 1 : 2, the ratio of their velocities is
2 : 1
3 : 2
2 : 3
1 : 1
A narrow beam of protons and deuterons, each having the same momentum, enters a region of uniform magnetic field directed perpendicular to their direction of momentum. The ratio of the radii of the circular paths described by them is
2 : 5
3 : 2
2 : 3
1 : 1
A horizontal overhead power line carries a current of 90 A in east to west direction. The magnitude and direction of the magnetic field due to the current 1.5 m below the line is
2.5 x 10-5 T towards north
3 x 10-5 T towards east
1.2 x 10-5 T towards south
1 x 10-5 T towards west