Question # 1

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

Resistance tolerance of silver band is.

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10%

6%

7%

5%

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

In carbon resistors, then value of Blue colour is.

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6

7

8

9

What is the resistance of carbon resistor which has band brown black brown.

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100 Ohm

1000 Ohm

10 Ohm

1.0 Ohm

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:

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3Ω

4Ω

4.5Ω

5Ω

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