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. 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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2. In the space surrounding a wire carrying a steady current, there exists ________
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3. The electric flux is a --------------------------- quantity.
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4. 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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5. 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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6. 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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7. When a dielectric material is inserted between the plates of a capacitor it increases its ---------------------------
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8. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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9. Gaussian surface is an imaginary closed ---------------------------
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10. 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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11. The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------
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12. Electric field is measured in Newton per ---------------------------.
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13. A negative charge ---------------------------negative charge
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14. When an atom is in the ground state it is said to be ---------------------------
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15. Whose law is employed in electrostatics ?
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16. From Gauss’ law which of the following is NOT correct?
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17. Electric charge between two bodies can be produced by ---------------------------
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18. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.
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19. 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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20. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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21. 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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22. 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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23. Find the force on a charge 2C in a field 1Vm<sup>-1</sup>---------------------------
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24. 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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25. Find the current in through the $0.3Omega$ in the circuit shown
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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. What are the dimensions of the constant k in Coulomb’s law of electrostatics?
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28. A positively charged object repels
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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. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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31. Which of the following is not true of an electrostatic force?
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32. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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33. 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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34. 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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35. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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36. 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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37. 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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38. <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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39. 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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40. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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41. The following are true about electric field lines except that they ______
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42. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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43. 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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44. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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45. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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46. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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47. A region where an electric charge experiences a force is ---------------------------field
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48. 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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49. When amber is rubbed with fur
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50. For capacitors connected in series each has the same ____________.
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