Question # 1

Resistance tolerance of silver band is.

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10%

6%

7%

5%

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

The current through a resistance of 100 Ohm when connecting across a source of 220 V is.

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22000 A

22 A

2.2 A

0.45 A

The resistivity of --------------------decrease with the increase in temp

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Gold

Silver

Copper

Silicon

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

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

The algebraic sum of potential change in a closed circuit is zero.

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Kirchhoff's 1st rule

Kirchhoff 2^nd rule

Krichoff's 3^rd rule

Kirchhoff 4^th rule

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

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.

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1/4 R

4R

2R

Same as R

the current which flows from a point at higher. potential to point at lower potential is called.

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Electric current

Conventional current

Either of these

None of above

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

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

The thermistors convert changes of temperature into.

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Light energy

Electric voltage

Heat

Sound

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

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Physics ICS Part 2 Chapter 13 Online MCQ's Test MCQs With Answers

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