A rectangle vessel when full of water, takes 10 mint to be emptied through an orifice in its bottom. How much time will it take to be emptied when half filled with water?

 

 

1.  9 min
2.  7 min
3.  5 min
4.  3 min

 

If there were no gravity, which of the following will not be there for a fluid?

 

1.  Viscosity
2.  Surface tension
3.  Pressure
4.  Archimedes’ upward thrust

A = 4i + 4j – 4k and B = 3i + j + 4k, then angle between vectors A and B is

 

Consider the following statements 
(i) For a permanent magnet the area of a hysteresis loop is allowed to be large. 
(ii) Coercively of the material in permanent magnets should be small. 
Which of the following statements is/are true?

 

1.  (i) but not (ii)
2.  (ii) but not (i)
3.  Both (i) and (ii)
4.  Neither (i) nor (ii)

Two capacitors of 10μF and 20μF are connected in series with a 30 V battery. The charge on the capacitors will be respectively

 

1.  100μ C, 100μC
2.  200 μC, 100 μC
3.  200 μC, 200 μC
4.  100 μC, 200 μC

The magnetic field at P on the axis of a solenoid having 100 turns/m and carrying a current of 5 A is 

 

In an isobaric process of an ideal gas. The ratio of heat supplied and work done by the system is

The velocity of sound in air at NTP is 330 m/s. What will be its value when temperature is doubled and pressure is halved?

 

Doppler’s effect is sound in addition of relative velocity between source and observer or both are moving. Doppler effect in light depend only on the relative velocity of source and observer. The reason of this is

 

If EMF = 4 volt ω = 1000t volt is applied to an L-R circuit of inductance 3 mH and resistance 4Ω, the amplitude of current in the circuit is