SRMJEEE Physics Mock Test - 7 - JEE MCQ

A plumb line is suspended from a ceiling of a ear moving with horizontal acceleration of a. What will be the angle of inclination with vertical?

Steel and copper wires of same length are stretched by the same weight one after the other.Young's modulus of steel and copper are 2 X 10¹¹ N/m² and 1.2 X 10¹¹ N/m². The ratio of increase in length

An object initially at rest explodes into three fragments A, B and C. The momentum of A is Pi and that of B is √3Pj where P is a positive number. The momentum of C will be

The de Broglie wavelength λ associated with an electron having kinetic energy E is given by the expression

The resistors of resistances 2 Ω, 4 Ω and 8 Ω are connected in parallel, then the equivalent resistance of the combination will be

If a transistor amplifier has a gain of 20 dB, then the ratio of output to input power is

If the charge on a body is increased by 2C, the energy stored in it increased by 21%.The original charge on the body in coulombs 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

In an artificial satellite a space traveller tries to fill ink in a pen by dipping it in ink. The amount of ink filled in the pen as compared the quantity of ink filled on earth's surface will be

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

If the kinetic energy of one mole of an ideal gas is given as E = 3/2 RT, (where R is the universal gas constant and T is the absolute temperature of the gas), the molar specific heat at constant pressure will be given as

Two equal forces of magnitude P each act at a point inclined to each other at an angle of 120°. The magnitude of their resultant is

Two long parallel wires P and Q are held perpendicular to the plane of paper with distance of 5 m between them. If P and Q carry current of 2.5 amp. and 5 amp. respectively in the same direction, then the magnetic field at a point half-way between the wires is

If the moment of a magnet is 400 C.G.S units, and the force acting on each pole in a uniform magnetic field of strength 0.32 oersted is 5.12 dynes. The distance between the poles of the magnet is equal to

In a capillary tube, water rises upto 3 mm. The height of water that will rise in another capillary tube having one-third radius of the first is

A particle covers 150 m in 8th second starting from rest, its acceleration is

A particle (A) is dropped from a height and another particle (B) is thrown in horizontal direction with speed of 5 m/sec from the same height. The correct statement is

When a body is stationary

If a body is released into a tunned dug along the diameter of the earth of radius R₀, it executes the S.H.M. with time period:

A cricketer can throw a ball to a maximum horizontal distance of 100 m. The speed with which he throws the ball is (using g = 10 m/s²)

A wire of length L and cross-section A is made of material of Young's modulus Y. It is stretched by an amount x, the workdone is

When a beam of light is used to determine the position of an object, the maximum accuracy is achieved, if the light is

Of the two eggs which have identical sizes, shapes and weights, one is raw, and other is half boiled. The ratio between the moment of inertia of the raw to the half boiled egg about central axis is

A body moves due east with a velocity of 25 km/h and then due north with a velocity of 25√3 km/h. The magnitude of the change in velocity is

It is easy to wash clothes in hot water because its

The temperature of the cold junction of a thermocouple is 0°C and temperature of the hot junction is T°C. The thermo e.m.f. is given by the relation E = AT-1/2BT²(Where A = 16 and B = 0.08). The temperature of inversion is

When the volume of a saturated vapour is decreased, its pressure