List of top Physics Questions asked in VITEEE, NEET (UG)

The length of elastic string, obeying Hooke’s law, is \( \ell_1 \) metres when the tension 4N and \( \ell_2 \) metres when the tension is 5N. The length in metres when the tension is 9N is:

The I-V characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is:

In Young's double slit experiment, intensity at a point is \( \dfrac{1}{4} \) of the maximum intensity. Angular position of this point is (separation between slits is \( d \)):

The horizontal component of the earth’s magnetic field is \( 3.6 \times 10^{-5} \) tesla where the dip angle is 60°. The magnitude of the earth’s magnetic field is:

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is:

Two batteries of emf 4 V and 8 V with internal resistance 1 \( \Omega \) and 2 \( \Omega \) are connected in a circuit with a resistance of 9 \( \Omega \) as shown in the figure. The current and potential difference between the points P and Q are:

The velocity of water in a river is 18 km/hr near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water is \( 10^{-2} \) poise:

Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelength \( \lambda_1 : \lambda_2 \) emitted in the two cases is:

In a common emitter transistor amplifier \( \beta = 60 \), \( R_o = 5000 \, \Omega \) and internal resistance of a transistor is 500 \( \Omega \). The voltage amplification of amplifier will be:

A machine gun has a mass 5 kg. It fires 50 gram bullets at the rate of 30 bullets per minute at a speed of 400 m/s. What force is required to keep the gun in position?

The equivalent capacitance between a and b for the combination of capacitors shown in figure where all capacitances are in microfarad is:

A metallic sphere is placed in a uniform electric field. The line of force follow the path (s) shown in the figure as:

The activity of a radioactive sample is measured as 9750 counts per minute at \( t = 0 \) and as 975 counts per minute at \( t = 5 \) minutes. The decay constant is approximately:

Two coils have a mutual inductance 0.005 H. The current changes in the first coil according to equation \( I = I_0 \sin \omega t \), where \( I_0 = 10A \) and \( \omega = 100\pi \, \text{radian/sec} \). The maximum value of e.m.f. in the second coil is:

The magnetic field at a point due to a current carrying conductor is directly proportional to:

Which of the following is the correct lens formula?

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be:

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is:

In a common emitter transistor amplifier $\beta = 60, \,R_o = 5000\, \Omega$ and internal resistance of a transistor is $500 \,\Omega$Voltage amplification. The voltage amplification of amplifier will be

The resistance of $0.01\, N$ solution of an electrolyte was found to be $220\, ohm$ at $298\, K$ using a conductivity cell with a cell constant of $0.88\,cm^{-1}$. The value of equivalent conductance of solution is -

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is

The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is:

A large number of liquid drops each of radius r coalesce to from a single drop of radius R. The energy released in the process is converted into kinetic energy of the big drop so formed. The speed of the big drop is (given, surface tension of liquid T, density $\rho$)

The horizontal component of the earth?s magnetic field is $3.6 \times 10^{-5}$ tesla where the dip angle is $60^{\circ}$. The magnitude of the earth?s magnetic field is

In the given circuit the reading of voltmeter $V_1$ and $V_2$ are $300$ volt each. The reading of the voltmeter $V_3$ and ammeter $A$ are respectively