Note:- Fill the appropriate answer of
the following questions in the answer sheet. Double filling and erasing is not allowed.
Each question carries equal marks and for each wrong answer minus one is
awarded.
1) The
current that flows through the coil of a motor causes:
a) Its shaft to revolve b) Its brushes to rotate c) Motor to move d) Its shaft to rotate
2) In
case of metallic conductor, the charge carries are:
a) Protons b) Electrons c) Antiprotons d) Positrons
3) The
conventional current is the name given to current due to flow of:
a) Positrons b) Positive charges c) Negative charges d) Both (a) and (c)
4) The
positive charge moving in one direction is equivalent in all external affects
to a:
a) Negative charge moving in the
same direction b)
Positive charge moving in the opposite direction
c) Negative charge moving in the
opposite direction c)
Positive charge moving in the same direction
5) The
term drift velocity is use when the ends of a wire are:
a) Connected to a lesser source b)
Connected to a voltage source
c) Not connected to a voltage
source d)
At different values of potential
6) When
resistance of a current carrying wire increases due to rise in temperature, the
drift velocity of electrons:
a) Decreases b) Increases c) Remains same d) Either of these
7) In
order to have a constant current through a wire, the potential difference
across its ends should:
a) Be zero b) Be maintained
constant c) Goes on increasing d) Go on decreasing
8) The
example of non electrical energy is:
a) Chemical energy b) Mechanical energy c) Heat energy d) All of these
9) Conversion
of chemical energy to electrical energy can be achieved by:
a) Primary cell b) Secondary cell c) Both (a) and (b) d) Photovoltaic cell
10)
The obvious effect of current is:
a) Heating effect b) Magnetic effect c) Chemical effect d) All of these
11)
The passage to current is accompanied by a magnetic field in the surrounding
space:
a) Always accompanied b) Sometimes accompanied c) Never accompanied d) Any of above
12)
Magnetic effect of current is used:
a) In electric motor b) To detect current c) To measure current d) All of these
13)
Two dissimilar metals joined at their ends kept at constant temperature
constitute:
a) Cell b) Voltmeter c) Thermocouple d) Potentiometer
14)
Electrolysis is the study of conduction of electricity through:
a) Solids b) Liquids c) Gases d) All of these
15)
The vessel containing the two electrodes and certain liquid is knows as:
a) Voltmeter b) Electrolyte c) Voltammeter d) Calorimeter
16)
During electrolysis process (using CuSO4) density of CuSO4
solution:
a) Increases b) Decreases c) Remain same d) Any of above
17)
The practical unit of current is:
a) Ampere b) Ohm c)
Coulomb d)
Volt
18)
If the resistance of the conductor is increased, then current will:
a) Increases b) Decreases c) Remains same d) First increase then
decrease
19)
The unit of resistance is:
a) Ampere b) Volt c) Ohm d) Coulomb
20)
A sample of a conductor is said to obey Ohm’s law if graph b/w V and I is:
a) Straight line b) Curve c) Parabola d) Either (a) or
(b)
21)
Resistance of a wire is:
a) Directly proportional to
length b)
Directly proportional to its area
c) Inversely proportional to its
area d)
Both (a) and (c)
22)
The resistivity of a material of the wire depends upon:
a) Length of the wire b) Resistance of the wire c) Area of cross section d) Material of wire
23)
The unit of resistivity is:
a) Ohm b) Ohm per meter c) Ohm meter d) Meter per ohm
24)
Conductivity is reciprocal of:
a) Resistivity and measured in
ohm meter b)
Resistance and measured in ohm
c) Resistivity and measured in
ohm per meter d)
Resistivity and measured in per ohm per meter
25)
Temperature coefficient of resistance is defined as:
a) Change in resistance per
degree centigrade b)
Change in resistance per Kelvin
c) Fractional change in
resistance per degree Fahrenheit d)
Fractional change in resistance per Kelvin
26)
The value of resistivity is the least for:
a) Copper b) Aluminium c) Silver d) Tungsten
27)
Resistance decreases with increase in temperature in case of:
a) Germanium b) Carbon c) Silicon d) Both (a) and
(c)
28)
Ohm centimetre is the unit of:
a) Resistance b) Specific
resistance c) Specific
resistance d) Conductance
29)
Which of the following substance has got positive temperature coefficient of
resistance:
a) Carbon b) Germanium c) Silicon d) Aluminium
30)
The third band of the colour code:
a) Gives the number of zeroes b) Is decimal
multiplier
c) Gives the resistance
tolerance d)
Gives the third digit
31)
The wire used in the construction of a rheostat is of the material:
a) Magnesium b) Iron c) Platinum d) Gold
32)
When rheostat is used as potential divider, the shifting of the sliding contact
to one side cause:
a) The change in the current b)
The change in the output voltage
c) The change in the output
resistance d)
Both (b) and (c)
33)
‘Physical state’ in the statement of Ohm’s law means:
a) Temperature of the conductor b)
Pressure on the conductor
c) Length of the conductor d)
Area of cross section
34)
Thermistors are prepared under:
a) High pressure and low
temperature b)
High pressure and high temperature
c) Low pressure and low
temperature d)
Low pressure and high temperature
35)
A temperature sensor converts changes of temperature into:
a) Sound signal b) Electrical voltage c) Magnetic lines of force d) Light signals
36)
Heat is produced in a conductor due to flow of current because:
a) Its atoms are attracted
towards each other b)
Its atoms are repelled from each other
c) Kinetic energy of its atoms
increases d)
Potential energy of its atoms increases
37)
If V is expressed in volts and I in amperes, the power is expressed in:
a) Volt/ampere b) Watt-1 c) Volt-ampere d) Ampere/volt
38)
When the current is being drawn from the battery:
a) V = E- Ir is applied b) V = E + Ir is applied c) It is being discharged d) Both (a) and (c)
39)
When a battery is being charged, its terminal P.D is:
a) Equal to its emf b) Less than its emf c) Greater than its emf d) Muss less than its emf
40)
The loss of electrical energy per second is called:
a) Work b) Energy dissipated c) Power dissipated d) All of these
41)
The quantity having the same unit as that of emf is:
a) Force b) Energy c) Potential
difference d) Current
42)
When the cell is in open circuit the potential difference b/w the two plates is
known as:
a) Resistance b) Specific
resistance c) Electromotive
force d) Resistivity
43)
Kirchhoff’s first rule is a manifestation of law of conservation of:
a) Mass b) Energy c) Charge d) Kinetic
energy
44)
If the source of emf is traversed from negative to positive terminal, the
potential change is:
a) Negative b) Positive c) Zero d) Either
of these
45)
Kirchhoff’s second rule is a manifestation of law of conservation of:
a) Mass b) Charge c) Kinetic energy d) Charge
46)
Potential difference can be measured by:
a) Voltmeter b) Potentiometer c) CRO d) Both (a)
and (b)
47)
No deflection in the galvanometer in a balanced wheat-stone bridge means that
the terminals of galvanometer are at:
a) Same potential b) Different potential c) Zero potential d) Both (a) and (c)
48)
An ideal voltmeter has:
a) Zero resistance b) Small resistance c) Large resistance d) Infinite resistance
49)
Which instrument is expensive and difficult to use:
a) Voltmeter b) Potentiometer c) CRO d) Both (b)
and (c)
50)
Kirchhoff’s first rule is also called:
a) Loop rule b) Thumb rule c) Point rule d) Right hand rule
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