Question # 1

The device which allows only the continuous flow of AC through it is.

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Inductor

Battery

Thermistor

Capacitor

Truth table of logic function.

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Summarize its output values only

Tabulates all its input conditions only

Display all its input and output possibility

Is not base on logic algebra

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

When a conductor moves across a magnetic field an emf is set up this emf is called.

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Variable emf

Constant emf

Back emf

Induced emf

First spectral series of hydrogen atom was discovered by

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Lyman

Rydberg

Balmer

Paschen

In order to measure potential difference voltmeter is always connected in.

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Series

Parallel

Both a and b

Neither in series nor in parallel

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid way between them is.

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1 V

2 V

Zero

V/2

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

With the speed of motor, magnitude of back emf

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Remain same

Increase

Decrease

First increases then decreases

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

The wave form of alternating voltage is a

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Cotangent curve

Cosine curve

Sine curve

Tangent curve

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

An ammeter is an electrical instrument which is used to measure.

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Voltage

Current

Resistance

None

An alternating voltage is given by 20 sin 157 t. Th efrequency of alternating voltage is:

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50 Hz

25Hz

100 Hz

75 Hz

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

If magnetic field is doubled then magnetic energy density becomes.

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Four times

Two times

Three times

Six times

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