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.
Good luck!
PHY102
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1. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.
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2. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.
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3. Kirchhof's junction rule is statement of conservation of -----------
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4. 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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5. As charge increases, electric flux density ---------------------------
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6. <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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7. Charges of ${+}2$ C and ${-2}$ C are situated at points P and Q respectively which are at a distance apart. A point X is mid-way between P and Q. Which of the following correctly describes the electric field and the electric potential at point X?
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8. The work done in taking a unit positive charge from one point to another in electric field is --------------------------- of the path chosen between the two points.
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9. 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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10. The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.
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11. A single turn coil of cross-sectional area $7.2cm^2$ is in the a magnetic field of flux desity 0.45T. The field which is perpendicular to the coil, is steadily reduced to 0.0T in 5s. Calculate the induced emf.
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12. A region where an electric charge experiences a force is ---------------------------field
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13. Which of the following is not true about the electric field intensity $vec{E}$ of a uniformly charged solid sphere?
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14. If the steady current in a wire is coming directly toward you, the magnetic field lines
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15. When a copper surface is illuminated by radiation of wavelength 2537 angstrome units the value of the stopping potential is found to be 0.24volts. Calculate the work function of copper.
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16. An RLC circuit is used to tune a radio set to receive NOUN RADIO broadcasting at 105.9MHz in the FM band. The resistance and the inductance of the circuit of the radio set are $12Omega$ and 1.4$mu$H respectively. What capacitance should the circuit have?
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17. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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18. When beta decay occurs --------------------------- changes into a proton and electron.
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19. An electron enters a uniform magnetic field 0.20 T at an angle of $30^{o}$ the field. Determine the pitch of the helical path assuming its speed is $3times10^{7}$ m/s
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20. 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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21. In the circuit shown, each of the cells has an emf of 2V and internal resistance of $0.1Omega$. Find the current in through the $0.5Omega$
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22. Find the current in through the $0.3Omega$ in the circuit shown
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23. 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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24. When a dielectric material is inserted between the plates of a capacitor it increases its ---------------------------
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25. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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26. 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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27. Two identical balls balls P and Q, each of mass 0.20 g, carry identical charges and are suspended by two threads of equal length. The balls position themselves at equilibrium such that the angle between the threads is 60_{o}.If the distance between the the balls is 0.5m, find the charge on each of them. Take g = 9.8 m/s^{2}
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28. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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29. Which of the following is not true of an electrostatic force?
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30. 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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31. Electric charge between two bodies can be produced by ---------------------------
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32. A rectangular coil of dimensions 20 cm by 15 cm lies with its plane parallel to a magnetic field of $ 0.5 W/$m^{2}$. The coil, carrying a current of 10 A experiences a torque of 4.5 Nm in the field. How many loops has the coil?
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33. Gaussian surface is an imaginary closed ---------------------------
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34. Whose law is employed in electrostatics ?
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35. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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36. The magnetic flux through each loop of a 35-loop coil is given by $(3.6t-0.71t^{3})times10^{-2}Tm^{2}$, where the time is in seconds. Determine the induced emf at t=5.0s.
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37. Calculate the electric field at distance of 320 cm from an infinitely long wire carrying a charge per unit length 8.3 C/m.
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38. Kirchhof's loop rule is statement of conservation of __________
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39. In the space surrounding a wire carrying a steady current, there exists ________
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40. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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41. 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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42. The --------------------------- number is the total number of neutrons and protons.
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43. 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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44. 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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45. An ammeter is suspected of giving inaccurate readings. In order to confirm the readings, the ammeter is connected to a silver votltameter in series and a steady current is passed for one hour. The ammeter reads 0.56A and 2.0124g of silver is deposited. What is the error is the ammeter reading?
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46. 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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47. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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48. When a charge density depends only on the perpendicular distance from a plane, the charge distribution is said to have--------------------------- symmetry.
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49. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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50. For capacitors connected in series each has the same ____________.
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