JUPEB 2016: PHYSICS: SCI-J155 – Multiple Choice Questions

An object is released from rest on a planet that has no atmosphere. The Object falls freely for 3.0 metres in 1 second. What is the magnitude of the acceleration due to gravity of the planet?

A bird is flying in a straight line initially at l0m/s. It uniformly increases its speed to 15m/s. while covering a  distance of 25m. What is the magnitude of the distance of the bird?

A sinusoidal wave travels in the positive x-direction with amplitude of 15.0cm, wavelength 40.0cm and frequency of 8.00Hz. At time t = 0 and x = 0, the wave amplitude is 15.0cm. The wavenumber and period of the wave are?

A string produces waves with a frequency of 5.00 Hz and has amplitude 12.0cm. The speed of the wave will be?

The equation of a progressive sinusoidal wave can be written as y = (2.00cm) sin (3.62t-2.11x) where x is in metres and t in seconds. The frequency of the wave is

A negatively-charged particle is slowly moving as it enters a region that has a constant magnetic field. If the velocity of the particles is initially perpendicular to the magnetic field, the subsequent motion of the particle will follow

Consider two parallel wires carrying current in the same direction. Which one of the following statements is true concerning this situation?

The plane of a conducting loop is oriented parallel to the x-y plane. A magnetic field is directed in the –z-direction. Which of the following actions will not change the magnetic flux through the loop?

When protons and neutrons join together to make a nucleus, energy is

Which of the following could not be explained in terms of classical physics?

I. the photoelectric effect

II. Variation of mass with speed
III. the Compton effect

Which of the following statement is incorrect?

All except one of the following quantities can be possessed by both x-ray and an atom of hydrogen. Find the exception

The spaceship NIGX travelling through the galaxy sends out a smaller explorer craft that travels to a nearby planet and signals its findings back. The proper time for the trip to the planet is measured by clock.

For a given liquid at atmospheric pressure, which of the following processes can occur at any temperature

A wire is stretched by 8mm when a load of 60N is implied. What will be the extension of a wire of the same material having four times the cross-sectional area and twice the original length, when the same load is applied?

Which of the following is the correct combination of dimensions for energy?

Which of the following expression defines power?

A simple pendulum has a period of 17.0s. When the length is shortened by 1.5m, its period is 8.5s. Calculate the original length of the pendulum.

A gas with initial volume 2 x 10⁶ m³ is allowed to expand six times its initial volume at constant pressure of 2 x 10⁵Nm”\ The work done is

A resistance R. is connected across the terminal of an electric cell of internal resistance 2.0 Ω, and the voltage was reduced to ³/₅ of its nominal value. The value of R is

A bread toaster uses a current of 4.0 A when plugged in a 240.0 volts line. It takes one minute to toast slices of bread. What is the energy consumed by the toaster.

The energy associated with the photon of a radio transmission at 3 x 10⁵ Hz is approximately (h = 6.63 x 10^-34Js)

In a pure semiconductor, the number of electrons, in the conduction band is

Light energy 5eV falls on a metal of work function 3eV and electrons are liberated. The stopping potential is

In the equation (P + a / v2) (V-b) = RT, what are-the dimension of a?

A small mass is suspended from a long thread so as to form a simple pendulum. The period T of the oscillations depends only on the mass m, the length 1 of the thread the acceleration g due to gravity at the place connected. Then, T = km* 1 ^yg^z, where x, y, z and k are constants. Find the values of x, y and z.

The work function of Caesium is 2.5eV. What is the threshold frequency of radiation, that can eject electron from the metal?

Calculate the energy in eV for an electron in the sixth excited state in a Hydrogen atom

Which of the following is a set of vectors?

The unit of power “Watt” is equivalent to

A tyre is pumped to a pressure of 30Nm”² at 270°C when the tyre heats up to 540°C the new pressure assuming no change in volume is

The product of pressure (P) and volume (V) has the unit of

Which of the following quantities is a vector?

The equivalent capacitance of three capacitors, each of capacitance C, connected in series is

In the radioactive series,

${}^{235}{\mathrm{W}}_{92} {\to }^{235}{\mathrm{X}}_{93} \to {}^{232}{\mathrm{Y}}_{91}\to {}^{231}{\mathrm{Z}}_{92}$

What is the peak voltage of a 110V r.m.s main supply?

The stress of an object when a force acts on it is equal to

According to Hooke’s law, the force needed to elongate an elastic object by an amount’s’ is proportion tos

A 20.0m length wire of 1.50mm in diameter has resistance of 2.5Ω. What is the resistance of 35.0m length of wire 3.0mm in diameter made of the same material?

To tune a parallel resonant circuit to a higher frequency, the capacitance should be

Which of the following statements are correct?

I. X-rays travel at the speed of light

II. X-rays may be produced when high – energy electrons are stopped by a target

III. X-ray are high energy electrons