SRMJEEE Physics Mock Test - 1 - JEE MCQ

Resistances n each of r ohm, when connected in parallel combination, give an equivalent resistance of R. If these resistances are connected in series, then the new combination would have a resistance equal to

Which of the following is a correct statement?

A bullet of mass m is fired into a block of wood of mass M which hangs on the end of a pendulum and gets embedded in it. When the bullet strikes the wooden block, the pendulum starts to swing with a maximum rise R. The velocity of the bullet is given by

The ratio of the lengths of two wires A and B of same material is 1:2 and the ratio of their diameter is 2:1. They are stretched by the same force, then the ratio of increase in length will be

A wheel having metal spokes of 1m long between its axle and rim is rotating in a magnetic field of flux density 5 x 10⁻⁵ T normal to the plane of the wheel. An e.m.f of 22/7 m V is produced between the rim and the axle of the wheel. The rate of rotation of the wheel in radians per second is

A nibble is equal to

A charged particle accelerated through a potential difference of 100V passes through the uniform electric and magnetic fields so as to experience no deflection. E = 15 x 10⁶ V / m and B = 5 x 10³ T. The specific charge e/m is

A force of 750 N is applied to a block of mass 102 kg to prevent it form sliding on a plane with an inclination angle 30° with the horizontal. If the coefficients of static friction and kinetic friction between the block and the plane are 0.4 and 0.3 respectively, then the frictional force acting on the block is

If a satellite is orbiting the earth very close to its surface, then the orbital velocity mainly depends on

On increasing the temperature of a substance gradually, which of the following colours will be noticed by you

In thermal equilibrium, the average velocity of gas molecules is

A body, whose momentum is constant, must have constant

A straight conductor carrying current I. If the magnetic field at a distance r is 0.4 tesla, then magnetic field at a distance 2r will be

A short bar magnet with its north pole facing north forms a neutral point at P in the horizontal plane. If the magnet is rotated by 90° in the horizontal plane, the net magnetic induction at P is (Horizontal component of earth's magnetic field = B H)

A river water is flowing at 5ms −1. The depth of river water is 10m. The shearing stress between horizontal layers of the river water is (Viscosity of water is 1 decapoise)

A stone is dropped into a lake from a tower of 500 m height. The sound of splash will be heard after (Take g = 10 m-s⁻²)

Which of the following statement is false?

The time periode of simple pendulum measured inside a stationary lift is found to be T. If the lift starts acclerating upwards with an acceleration g/3, the time periode is

Identify the correct statement among the following

A stone thrown at an angle θ to the horizontal reaches a maximum height h. The time of flight of the stone is

The rise of liquid in a capillary tube has a meniscus. If the angle of contact is 90°, the shape of the meniscus is

A concave mirror gives an image three times as large as the object placed at a distance of 20 cm from it. For the image to be real, the focal length should be

A wheel is rotating at 900 r.p.m. about its axis When power is cut off it comes to rest in 1 minute The angular retardation in rad/s² is

A boat is sent across a river with a velocity of 8 km/h. If the resultant velocity of the boat is 10 km/h, the river is flowing with a velocity of

The rise of liquid due to surface tension in a narrow capillary tube of diameter 'd' is 'h'. If the diameter is reduced to d/2 , the rise will be

A silver voltameter of resistance 2 ohm and a 3 ohm resistor are connected in series across a cell. If a resistance of 2 ohm is connected in parallel with the voltameter, then the rate of deposition of silver

The temperature at which the reading of a Fahrenheit thermometer will be double that of a centigrade thermometer is