ATTENTION:
Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.
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PHY102
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1. An RLC circiut contains an ac voltage source with rms value of 50V and has a frequency of 600Hz. Suppose that a resistance R = 20 $Omega$, capacitance C = 10.0 $mu$F and an inductance L = 4.0mH are connected in series to the source. Find the current in the circuit and the voltmeter reading across the inductor.
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2. A proton is accelerated through a potential difference of 100V and the enters a region in which it is moving perpendicular to a magnetic field of flux density 0.20 T. Find the radius of the circular path in which it will travel.
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3. A positive ion passes through an electric and magnetic fields which are mutually perpendicular. The electric field strength is 20.0kV/m while the magnetic flux density is 0.40T. At what speed will the ion pass through undeflected?
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4. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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5. A region where an electric charge experiences a force is ---------------------------field
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6. The variation of the compass from the north-south direction is called the ---------------------------
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7. Three point charges $$2mu{C$}, ${-}4mu{C}$$, and $$6mu{C}$$ are held at the corners of an equilateral triangle with sides equal to 3 cm.What is the resultant force in newtons on the $$2mu{C}$$ charge?
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8. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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9. <p style="text-align:left">Six equal point charges Q = 10nC are located at 2,3, 4,5,6,7m. Find the potential at origin.
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10. The force applied to a conductor is 10N if the charge in the conductor is 5C, what is the electric field intensity?
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11. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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12. The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------
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13. The half-life of a certain radioactive isotope is 32 hours. What fraction of the sample would remain after 16 hours?
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14. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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15. A charge distribution in which the charge density at any point depends only on the distance of the point from a central point and not on the direction is said to be spherically ---------------------------
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16. A uniform electric field of 200 N/C is in the x-direction. A point charge of 3mu{C} is released from rest at the origin. What is the kinetic energy of the charge when it is at x = 4 m?
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17. A tiny ball of mass 0.60 g is suspended from a rigid support with a piece of thread in a horizontal electric field of intensity 700 N/C. The ball is in equilibrium when the thread is inclined at an angle of 20_{o} to the vertical. What are the magnitude and sign of the charge on the ball? Take g = 9.8m/s^{2}
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18. Find the current in through the $0.3Omega$ in the circuit shown
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19. A potentiometer wire of length 100cm has a resistance of 10$Omega$. It is connected in series to to a resistance R and a cell of emf 2V and negligible internal resistance. A source of emf of 10mV is balanced by a length of 40cm of the potentiometer wire. What is the value of the resistance R?
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20. The electric potential difference between two points A and B is 42 V. What is the work done by an external agent in carrying a charge of 5.0$times 10^{-5}$ C from A to B at constant speed?
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21. For how long must a steady current of 2A flow through a copper voltameter to deposit $10^{-3}$kg of copper? Z for coper is 0.000329g/C
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22. An electric field of 50 kV/m is perpendicular to a magnetic field 0.25 T. What is the velocity of a charge whose initial of motion is perpendicular to both fields and which passes through the fields undeflected?
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23. Which of the following can be used to charge a metal rod that si held in your hand? Rub it with ______
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24. When a dielectric material is inserted between the plates of a capacitor it increases its ---------------------------
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25. A body that absorbs all radiations falling on it is known as ---------------------------.
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26. A conductor 2cm long carrying a current of 8A lies at right angles to a magnetic field of which the flux density is 1.0T. Calculate the force exerted on the conductor
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27. The force between electric charges is known as ---------------------------
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28. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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29. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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30. Property of magnetic material in which --------------------------- attracts or repels.
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31. Which of the following is a conductor
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32. The --------------------------- is the SI Unit of electric charge
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33. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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34. Neutral objects constitute of equal ---------------------------
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35. A negative charge ---------------------------negative charge
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36. The potential difference between two points B and A is equal to the --------------------------- in taking a unit positive charge from A to B.
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37. The electric flux is a --------------------------- quantity.
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38. A voltmeter connected across a 60Hz ac source reads 240V. Write down the expression of the instanteneous voltage as a function of time.
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39. When an atom is in the ground state it is said to be ---------------------------
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40. The work function of a metal is 3.45eV. Calculate th maximum wavelength of a photon that can eject photo-electrons from the metal
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41. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.
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42. Electric field is measured in Newton per ---------------------------.
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43. According to ohm's law the potential difference is proportional to the ---------------------------
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44. According to Faraday's law, the magnitude of the induced e.m.f is proportional to the rate of change of --------------------------- linking the circuit.
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45. The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.
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46. When beta decay occurs --------------------------- changes into a proton and electron.
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47. A magnetic field does not exert a force on a _________
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48. A series circuit consisting of an uncharged $42mu$F capacitor and $10 MOmegaega$ resistor is connected to 100V power source. What are the current in the circuit and the charge on the capacitor after one time constant?
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49. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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50. An ac circuit consists of a voltage source $v = 200sin120pi{t}$ and a $6mu$F capacitor in series. Calculate the current established in the circuit
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