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. The variation of the compass from the north-south direction is called the ---------------------------
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2. 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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3. 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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4. 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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5. If the steady current in a wire is coming directly toward you, the magnetic field lines
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6. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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7. 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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8. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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9. 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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10. 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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11. 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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12. The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.
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13. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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14. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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15. 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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16. 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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17. A body that absorbs all radiations falling on it is known as ---------------------------.
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18. Which of the following is not true of an electrostatic force?
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19. Property of magnetic material in which --------------------------- attracts or repels.
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20. In the space surrounding a wire carrying a steady current, there exists ________
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21. Find the force on a charge 2C in a field 1Vm<sup>-1</sup>---------------------------
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22. 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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23. An air-cored transformer is assumed to be 100% efficient. The ratio of the secondary turns to the primary turns is 1:20. A 240V ac supply is connected to the primary coil and a $6Omega$ load is connected to the secondary coil. what is the current in the primary coil?
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24. As charge increases, electric flux density ---------------------------
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25. The term 'lost volts' refers to -----------
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26. 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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27. 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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28. 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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29. 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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30. Kirchhof's loop rule is statement of conservation of __________
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31. Potential difference is the work done in moving a unit charge ____ from one point to another in an electric field.
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32. 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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33. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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34. Electric flux density is a function of ---------------------------
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35. A galvanometer of resistance $120Omega$ a full scale deflection with a current of 0.0005A. How would you convert it to an ammeter that reads a maximum current of 5A?
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36. 1 volt is equal to ________
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37. For capacitors connected in series each has the same ____________.
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38. 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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39. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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40. 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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41. A negative charge ---------------------------negative charge
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42. The force between electric charges is known as ---------------------------
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43. 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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44. Find the current in through the $0.3Omega$ in the circuit shown
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45. 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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46. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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47. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.
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48. 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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49. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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50. Which of the following is not true about the electric field intensity $vec{E}$ of a uniformly charged solid sphere?
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