Question # 1

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

Galvanometer is sensitive when C/BAN is

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zero

Large

small

Negative

A pair of quark and anti quark makes a.

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Meason

harden

Lapton

Baryon

When transistor are used in digital circuits they usually operate in the :

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Active region

Break down region

Saturation & cutoff regions

Linear region

The reactance of inductor depends upon

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L

All of the above

Impedance is denoted by:

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A

Z

P

Q

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

when an inductor comes close to a metallic object, its inductance is.

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Decreased

Increased

Becomes half

Becomes 4 times

Concept of electric field lines was given by:

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Michelson

Henry

Michael faraday

Oersted

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

The Grid 'G' in cathode ray oscilloscope.

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Accelerate as well as focus electron beam

Control no. of electrons beam

Is at - Ve potential with respect to cathode.

Both d and b

The potential difference between the top and bottom of a cloud chamber is of the order of

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290 v

400 v

1 kv

None of above

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

1 kg mass will be equivalent to energy.

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9 x 10⁸ J

9 X 10¹² J

9 X 10¹⁶ J

9 X 10¹⁹ J

The impurity in the germinium is usually in the ratio of

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1:10⁶

1:10⁴

1:10⁸

1:10¹⁰

The unit for Plank's constant is:

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Js^-1

Jm

Js

Jm²

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