Question # 1

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

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

Resistance tolerance for gold colour is.

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50%

30%

20%

5%

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

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

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Carbon

Iron

Tungsten

Gold

The vessel containing the tow electrodes and liquid to known as.

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Chemical cell

Volt cell

Volta cell

Volta meter

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

Resistance tolerance of silver band is.

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10%

6%

7%

5%

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

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Gold

Silver

Copper

Silicon

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

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