1 |
Potentiometer is used to. |
Compare emf of two cells
Detect internal resistance of cell
Measure P.D.
All of these
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2 |
Kirchhoff's voltage rule is a way of stating conservation of. |
Mass
Charge
Energy
Momentum
|
3 |
Kirchhoff's first rule is the manifestation of the law of conservation of. |
Mass
Charge
Energy
Momentum
|
4 |
An ideal current source shall have resistance |
Zero
Finite but not zero
Infinite
Depend upon requirement
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5 |
Which one of the following bulbs has the least resistance. |
100 W
200 W
500 W
1000 W
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6 |
What is the resistance of carbon resistor which has band brown black brown. |
100 Ohm
1000 Ohm
10 Ohm
1.0 Ohm
|
7 |
Resistance tolerance of silver band is. |
10%
6%
7%
5%
|
8 |
Heat sensitive resistors are called. |
resistors
Capacitor
Thermistors
Inductors
|
9 |
A rheostat can operate as. |
Amplifier
Potential divider
Oscillator
Transformer
|
10 |
The thermistors convert changes of temperature into. |
Light energy
Electric voltage
Heat
Sound
|
11 |
Resistance tolerance for gold colour is. |
50%
30%
20%
5%
|
12 |
If the resistance of 500 Ohm have fourth band of silver colour then its upper maximum resistance will be. |
600 Ohm
550 Ohm
450 Ohm
400 Ohm
|
13 |
In carbon resistors, then value of Blue colour is. |
6
7
8
9
|
14 |
Colour codes are used to calculate the. |
Nature of resistor
Numerical value of resistance
Potential difference
Current
|
15 |
A certain wire has a resistance R, the resistivity of an other wire of an identical material with the first, except for twice its diameter is. |
1/4 R
4R
2R
Same as R
|
16 |
A substance having the negative temperature co efficient of resistivity out of the following is. |
Carbon
Iron
Tungsten
Gold
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17 |
Resistivity at a given temperature depends upon. |
Area of cross section
Length
Nature of material of conductor
Both length and area
|