Physics Mock Test-2

Out of the following which pair of quantities does not have same dimensions?

The value of Planck’s constant is

A dynamo converts

A 0.01 H inductor and √3 πΩ resistance are connected in series with a 220 V, 50 Hz Ac source. The phase difference between the current and emf is

A photon of wavelength 300nm interacts with a stationary hydrogen atom in ground state. During the interaction, whole energy of the photon is transferred to the electron of the atom. State which possibility is correct. (Consider, Planck’s constant = 4×10⁻¹⁵ eVs, velocity of light =3×10⁸ ms⁻¹, ionisation energy of hydrogen = 13.6 eV)

1 a.m.u. is equivalent to

A cell of emf E and internal resistance r supplies current for the same time t through external resistance R₁ and R₂ seperately. If the heat developed in both the cases is the same, then the internal resistance r will be

6Ω and 12Ω resistors are connected in parallel. This combination is connected in series with a 10 V battery and 6Ω resistor. What is the potential difference between the terminals of the 12Ω resistor?

According to photon theory of light which of the following physical quantities, associated with a photon, do not/does not change as it collides with an electron in vacuum

Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ m. The accelerating voltage for electrons in X-ray machine should be

A rod of 10 cm length is moving perpendicular to uniform magntic field of intensity 5×10⁻⁴Wbm⁻². If the acceleration of the rod is 5ms⁻¹, then the rate of increase of induced emf is

A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10⁻⁵ Wb. The inductance is

The electric vector vibration of an electromagnetic wave is given by E=(50 NC⁻1) sin ω(t-x/c). The intensity of the wave is

A common emitter amplifier gives an output of 3 V for an input of 0.01 V. If β of the transistor is 100 and the input resistance is 1 kΩ, then the collector resistance is

A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy stored is

64 identical spheres of charge q and capacitance C each are combined to form a large sphere. The charge and capacitance of the large sphere is

A body oscillates with amplitude of 10 cm in a horizontal platform. The maximum angular frequency which the platform can vibrate vertically such that body of mass 10 kg will not leave contact is

Height of geostationary satellite is

The momentum is most closely related to

The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two forces. The angle between the two forces is

A 220 volt and 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be

Two particles A and B having equal charges +6C, after being accelerated through the same potential difference, enter in a region of uniform magnetic field and describe circular paths of radii 2 cm and 3 cm, respectively. The ratio of mass of A to that of B is

An α-particle and a proton travel with the same velocity in a magnetic field perpendicular to the direction of their velocities. The ratio of the radii of their respective circular paths is

Which one of the following is a vector?

A motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity at the highest point of the circle will be

A boy playing on the roof of a 10m high building throws a ball with a speed of 10 m/s at an angle of 30⁰ with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground(g=10 ms⁻²)?

A car is moving with uniform acceleration. It covers 200 m in 2 sec and 220 m in next 4 sec. The velocity of car at the end of 7th second from start is

A ballet dancer, dancing on smooth floor, is spinning about a vertical axis with her arms folded with an angular velocity of 20 radian/sec. When she stretches her arms fully, the spinning speed decreases to 10 radian/sec. If l is the initial moment of inertia of the dancer, the new moment of inertia is

Two discs of same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their axes will be in the ratio

An object is attached to the bottom of a light vertical spring and set vibrating. The maximum speed of the object is 15cm/sec and the period is 628 mili-sec. The amplitude of the motion in cm is

Length of second pendulum is

Which of the following will be σ if Y=2.4 η?

Wires A and B are made from the same material. A has twice the diameter and three times the length of B. If the elastic limits are not reached, when each is stretched by the same tension, the ratio energy stored in A to that in B is

Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life of sample is T, then in time (T₂ – T₁), the number of decayed atoms is proportional to

The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate of a hydrogen-atom absorbs a photon of energy 12.75 eV. How many different spectral lines can one expect when the electron make a downward transition?

A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm. If tube length is 30 cm and image is formed at the least distance of distinct vision, what is the magnification produced by the microscope. (take,D=25 cm)

If the angle of minimum deviation is 60° for an equilateral prism, then the refractive index of the material of the prism is

If the pressure of gas is increased from 1.01×10⁵ Pa to 1.165×10⁵ Pa and volume is decreases by 10% at constant temperature then the bulk modulus of the gas is

If a carnot engine is working with source temperature at 227⁰C and sink temperature at 27⁰C, its efficiency will be

Two coherent sources of intensity ratio α interfere. In interference pattern, Imax – Imin/ Imax+ Imin is equal to

White light reflected from a soap film (Refractive Index =1.5) has a maxima at 600 nm and a minima at 450 nm with no minimum in between. Then, the thickness of the film is

An engine is moving towards a wall with a velocity 50 ms⁻¹ emits a note of 1.2 kHz. Speed of sound in air=350 ms⁻¹. The frequency of the note after reflection from the wall as heard by the driver of the engine is

A bus is moving with a velocity of 5 ms⁻¹ towards a huge wall. The driver sounds a horn of frequency 165 Hz. If the speed of sound in air is 335 ms⁻¹, the numebr of beats heard per second by a passenger inside the bus will be

Two bodies of masses m and 4 m are moving with equal K.E. The ratio of their linear momenta is

A body of mass 3 kg acted upon by a constant force is displaced by S meter, given by relation S=1/3t², where t is in second. Work done by the force in2 seconds