Concentrate" in this context is used as an intransitive verb. It doesn't require a direct object to complete its meaning. The subject of the sentence, "His ability," is the one performing the action of concentrating. Therefore, "concentrate" is an intransitive verb here.
One kilogram of ice at 0° C is mixed with one kilogram of water at 85° C. The final temperature of the mixture is
(Tale specific heat of ...
Which among the following is not a characteristic of transition metals?
A stream of water flowing horizontally with a speed of 20 m/s pushes out of a tube of cross-sectional area 10-1m2 and hits at a v...
A 4 cm wire carrying a current of 15 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27...
If a force is applied to two stationary objects with different masses for the same duration, what will be the same for both objects?
Which of the following optical phenomena CANNOT convert unpolarised light to plane polarised light?
Which law states that internal energy is a function of state and the increase in internal energy equals the sum of heat supplied to the system and work ...
Where is the magnetic force of a bar magnet the strongest?
A closely wound solenoid 40 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 2 cm. If the current carried is 8.0 A, e...
Which of the following materials exhibits piezoelectric effect?
