JIPMER Full Mock Test - 8 - NEET MCQ

An electric wire of length 'l' and area of cross section a has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of

A voltmeter having a resistance of 998 ohms is connected to a cell of e.m.f. 2 volt and internal resistance 2 ohm. The error in the measurement of e.m.f. will be​

The space between the plates of a parallel plate capacitor is filled consecutively with two dielectric layers of thickness d₁ and d₂ having relative permittivities ε₁ and ε₂ respectively. If A is area of each plate, the capacity of the capacitor is

An electromagnet has stored 648 J of energy, when a current of 9 A exists in its coils. If the current is reduced to zero in 0.3 s, then average induced e.m.f. in the coils is

During a current change from 2 A to 4 A in 0.05 second, 8 V of emf is developed in a coil. the coefficient of self-induction is

The capacitance of a parallel plate capacitor becomes 4/3 times its original value if a dielectric slab of thickness t = d/2 is inserted between the plates (where d is separation between the plates). The dielectric constant of the slab is

The velocity of electromagnetic wave is parallel to

An infinite no. of capacitors with capacitances 1μF, 1/21μF, 1/41μF, 1/81μF, ...etc. are connected in parallel combination. Their equivalent capcitance will be

A block weighs w is held against a vertical wall by applying a horizontal force f. The minimum value of F needed to hold the block is

If the value of g at the surface of the earth is 9.8 m/sec², then the value of g at a place 480 km above the surface of the earth will be​

A mass M is split into two parts m and (M - m), which are then separated by a certain distance. The ratio m/M , which maximizes the force of attraction between the two parts is

If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of

Mean free path of a gas molecule is :

If distance between the slits of Young's double slit experiment is reduced to half, then the fringe width will

A galvanometer can be changed into an ammeter by using

A positively charged particle moving due east enters a region of uniform magnetic field directed vertically upwards. The particle will

A uniform magnetic field acts at right angle to the direction of motion of electron. As a result of this, the electron describes a circular path of radius 2 cm. If speed of electron is doubled, then radius of circular path will become

A magnet of length 10cm and magnetic moment 1 Am² is placed along the side AB of an equilateral triangle ABC. If the length of the side AB is 10cm, the magnetic induction at the point 'C' is ( μ₀ = 4π × 10⁻⁷ Hm⁻¹ )

Isogonic lines are those for which

Most of the sustances show which of the magnetic property :

An incompressible fluid flows steadily through a cylindrical pipe which has radius 2 R at point A and radius R at point B. If velocity at point A is ν, then its velocity at point B is

The shape of liquid meniscus in capillary tube will be concave upwards, if the angle of contact is

A wire can be broken by applying a load of 200 N.The force required to break another wire of the same length and same material, but double in diameter, is

Moment of inertia along the diameter of a ring is​

A car drives along straight level frictionless road by an engine delivering constant power. Then velocity is directly propotional to

A radio active sample has a half life of 5 days. To decay from 8 micro curies to 1 micro-curie, the number of days taken will be

The decay constant of a radio active substance is λ . Its half life is