AIIMS Physics Mock Test - 8 - NEET MCQ

A 4 V battery of internal resistance 1 Ω sends a current through a 3 Ω resistor. The terminal potential difference is

The work function of aluminium is 4.125 eV. The cutoff wavelength for photoelectric effect for aluminium will be

A bullet of mass X moves with a velocity Y, hits a wooden block of mass Z at rest and gets embedded in it. After collision the wooden block with bullet moves with a velocity

In Thomson experiment of finding e/m for electrons, beam of electron is replaced by that of muons (particle with same charge as of electrons but mass 208 times that of electrons). No deflection condition in this case satisfied if

X-rays are produced due to

Uncertainty in position of the electron is of the order of de-Broglie wavelength. Making use of Heisenberg's uncertainty principle, it will be found that uncertainty in velocity ν is of the order of

In transformer, core is made of soft iron to reduce

When a.d.c. motor operates at 200 V, its initial current is 5 A, but when it runs at maximum speed, the current is only 3 A. What is its back emf ?

A step up transformer operates on a 230 volt line and supplies 2 amp to a load. The ratio of primary and secondary windings is 1:25. Determine the primary current .

A light bulb and a parallel plate capacitor (including a dielectric material between the plates) are connected in series to the 60-Hz ac voltage at a wall outlet. When the dielectric material is removed from the space between the plates, does the brightness of the bulb,

According to Maxwell's hypothesis, a changing electric field gives rise to

A charge Q is divided into two parts as q and (Q - q) so that for any given separation between q and (Q - q), the electrostatic interaction between q and (Q - q) is maximum. The ratio Q/q is

The total flux of the electric field through the six faces of a certain cube is + φ _E where φ _E is a positive constant. Which of the following statements is not necessarily true?

If the unit of force and length be each increased by four times, then the unit of energy is increased by

A body of mass 2 kg is thrown up vertically with kinetic energy of 490 joules. If the acceleration due to gravity is 9.8 m/s², then the height at which the K.E. of the body becomes half its original value is given by

A black body, at a temperature of 227ºC, radiates heat at a rate of 84 J-m⁻²-s⁻¹. When its temperature is raised to 727ºC, the heat radiated by it in J-m⁻^2-s⁻¹ will be

An electric iron which when hot has a resistance of 80Ω, is used on a 200 V source. Calculate the electric energy spent in kilowatt-hour if it is used for 2 hours.

A dip circle is so set that its needle moves freely in the magnetic meridian. In this position, the angle of dip is 40º. Now the dip circle is rotated so that the plane in which the needle moves makes an angle of 30º. with the magnetic meridian. In this position, the needle will dip by an angle

The force between two short bar magnets with magnetic moments M₁ and M₂ whose centres are r meter apart is 8 N, when their axes are in same line. If the separation is increased to 2 r, the force between them is reduced to

A wire of length L and area of cross-section A is made of material of Young's modulus y. If the wire is stretched by the amount x, the work done is

A cork is submerged in water by a spring attached to the bottom of a pail. When the pail is kept in elevator moving with acceleration downwards, the spring length

The first artificial disintegration of an atomic nucleus was achieved by

A lift is descending with an acceleration of 0.5 g. The time period of a simple pendulum suspended from its ceiling, if its time-period in stationary lift is 10 s, will be

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Friction helps motion of body.
Reason(R): Friction is electromagnetic in motion.

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Normal stress to volumetric strain will be the Bulk modulus of the given gas.
Reason(R): Compressibility is the reciprocal of Bulk modulus.

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): SI unit of T-m²/s is equivalent to volts.
Reason(R): Both are the units of potential difference

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A hollow-cylinder and a solid cylinder, each of the same mass will roll down the same incline at different speeds.
Reason(R) : The frictional forces in the two cases may be different.