ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 2

Electric generators which convert mechanical energy into

Question # 3

Equal charges are given to two spheres of different radii. The potential will

Question # 4

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 5

The SI unit of permitivity is

Question # 6

Ohm established a relation between

Question # 7

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 8

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 9

The resistivity of a substance depends upon the

Question # 10

If electric and gravitational force on an electron in a uniform electric field will be

Question # 11

The speed of randomly moving electrons depends upon

Question # 12

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 13

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 14

One electron volt is equal to

Question # 15

The electric field will be uniform

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
2 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons
3 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
4 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
5 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
6 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
7 An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
8 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
9 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
10 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve

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