Physics Test 64...

A conducting loop carrying a current I is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to

A small object of uniform density rolls up a curved surface with an initial velocity v′. It reaches up to a maximum height of 3v² / 4 g with respect to the initial position. The object is

A long solenoid of diameter 0.1 m has 2×10⁴ turns per metre. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4A in 0.05s. If the resistance of the coil is 10π²Ω, the total charge flowing through the coil during this time is.

If energy E, velocity V, and time T are chosen as the fundamental units, the dimensional formula for surface tension will be

An athlete throws a discus from rest to a final angular velocity of 15 rad/s in 0.270 s before releasing it. During acceleration, the discus moves a circular arc of radius 0.810 m. The acceleration of the discus before it is released is ___ ms⁻².

An AC source of variable frequency f is connected to an LCR series circuit. Which of the following graphs represents the variation of current in the circuit I with frequency f?

A mass M is divided into two parts Xm and (1−X)m. For a given separation, the value of X, for which the gravitational attraction between the two parts becomes maximum, is

A weightless thread can bear tension up to 3.7N. A stone of mass 500g is tied to it and revolved in a circular path of radius 4m in a vertical plane. If ′g′=10m/s⁻², what will be the maximum angular velocity of the stone?

An α particle is accelerated through a potential difference of 100V, then the de-Broglie wavelength associated with it is approximately

A metal ball immersed in alcohol weighs W₁ at 0^oC and W₂ at 59^oC. The coefficient of cubical expansion of the metal is less than that of alcohol. If the density of the metal is large compared to that of alcohol, then