Electrostatics Set 4 - ilmijazeera

Results

#1. Selenium is an

Insulator

Conductor

Semiconductor

Photoconductor

#2. The S.I unit of permittivity is:

N * m ^ 2 / C^ 2

C^ 2 / N * m ^ 2

N^ m / (C ^ 2)

N m ^ 2 / C

#3. In an inkjet printer, the charged ink drops are diverted by the deflection plates

Towards the charging electrodes

Towards the gutter

Towards a blank paper on which the print is to be taken

In inkjet printer ink cannot be charged

#4. The lines which provide information about the electric force exerted on charged particles are:

Magnetic field lines

Electric field lines

Tangent lines

Curved lines

#5. The electric field produced due to negative charge is always:

Radially outward

Radially inward

Circular

Zero

#6. The force experience by a unit positive charge placed at a point in an electric field is called:

Coulomb's force

Faraday's force

Lorentz's force

Electric field intensity

#7. Electric flux is defined as:

Phi = A.B

Phi= E*A

Phi = E.A

Phi = E/A

#8. Electric field intensity is also known as

Electric potential

Electric flux

Potential gradient

None

#9. Potential gradient is defined as

(Delta*E)/ (Delta*V)

(Delta*E)/ (Delta*Y)

(Delta*R)/ (Delta*V)

(Delta*V)/ (Delta*r)

#10. The SI unit of E are

(newton/meter)

(newton/coulomb)

(newton/ampere)

(newton x meter)

#11. The open loop gain of an operational amplifier is of the order of

10^5

10^2

10^-3

#12. The automatic working of streets lights is due to

Inductor

Capacitor

Comparator

Rectifier

#13. In half ware rectification, the output DC voltage is obtained across the load for

The positive half cycle of input AC b) c) )

The negative half cycle of input AC

The positive and negative half cycles of input AC

Either positive or negative half cycle of input AC

#14. The color of light emitted by LED depends on

Its forward biased

Its reversed biased

The amount of forward current

The type of semi-conductor material used

#15. A PN junction photodiode is

Operated in reversed direction

Operated in forward direction

A very fast photo detector

Dependent on thermally generated minority carriers

#16. Which one of the following is called fundamental gate

NOR gate

NOT gate

NAND gate

Exclusive OR gate

#17. For proper working of a transistor in normal circuits

Emitter base junction is reversed biased, collector base junction is forward biased

Emitter base junction is forward biased and collector base junction is forward biased

C-B junction is reversed biased, E-B junction is forward biased

C-B junction is reversed biased and E-B junction is reversed biased

#18. In a properly biased NPN transistor most of the electrons from the emitter

Recombine with holes in the base

Recombine in the emitter itself

Pass through the base to the collector

Are stopped by the junction barrio

#19. A diode characteristic curve is a graph between

Current and time

Voltage and time

Voltage and current

Forward voltage and reverse current

#20. A NOR Gate is ON only when all its input are

OFF

Positive

High

Finish