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Category: PHY102

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PHY102

1 / 50

 Find the current in through the $0.3Omega$ in the circuit shown

2 / 50

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?

3 / 50

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.

4 / 50

The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------

5 / 50

For capacitors in parallel, the potential difference across each capacitor is ---------------------------

6 / 50

Find the force on a charge 2C in a field 1Vm<sup>-1</sup>---------------------------

7 / 50

 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?

8 / 50

 Which of the following is a conductor

9 / 50

A region where an electric charge experiences a force is ---------------------------field

10 / 50

When an atom is in the ground state it is said to be ---------------------------

11 / 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

12 / 50

When a charge density depends only on the perpendicular distance from a plane, the charge distribution is said to have--------------------------- symmetry.

13 / 50

 Two charges $Q_{1} = 500mu{C}$ and $Q_{2} = 100mu{C}$ are located on the XY plane at the positions $r_{1} = 3vec{j} m and r_{2} = 4vec{i}$ m. Find the force exerted on the $Q_{2}$

14 / 50

 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?

15 / 50

According to ohm's law the potential difference is proportional to the ---------------------------

16 / 50

 If the steady current in a wire is coming directly toward you, the magnetic field lines

17 / 50

Electric field is measured in Newton per ---------------------------.

18 / 50

 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 $0.5Omega$

19 / 50

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?

20 / 50

Potential difference is the work done in moving a unit charge ____ from one point to another in an electric field.

21 / 50

In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.

22 / 50

The principle that electric forces add vectorially is known as the principle of ---------------------------

23 / 50

 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?

24 / 50

A positively charged object repels

25 / 50

The direction of the electric field is opposite to that of the force if the charge is ---------------------------

26 / 50

The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.

27 / 50

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?

28 / 50

 Kirchhof's loop rule is statement of conservation of __________

29 / 50

 Which of the following is not true about the electric field intensity $vec{E}$ of a uniformly charged solid sphere?

30 / 50

The force that is responsible for holding electrons to nuclei to form atoms is called the --------------------------- force

31 / 50

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.

32 / 50

1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.

33 / 50

 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.

34 / 50

When a dielectric material is inserted between the plates of a capacitor it increases its ---------------------------

35 / 50

A body that absorbs all radiations falling on it is known as ---------------------------.

36 / 50

The minimum energy required to liberate an electron from a metal surface is called ---------------------------.

37 / 50

 A huge spark due to electric discharge in the atmosphere produces all of the following except ______

38 / 50

An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.

39 / 50

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.

40 / 50

As charge increases, electric flux density ­---------------------------

41 / 50

 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

42 / 50

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?

43 / 50

 From Gauss’ law which of the following is NOT correct?

44 / 50

When amber is rubbed with fur

45 / 50

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}

46 / 50

Which of the following is not true of an electrostatic force?

47 / 50

 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?

48 / 50

The --------------------------- number is the total number of neutrons and protons.

49 / 50

The following are true about electric field lines except that they ______

50 / 50

 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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