Question # 1

The Lenz's law is also statement of:

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Law of conservation of mass

Law of conservation of charge

Law of conservation of energy

Law of conservation of momentum

The dimensions of magnetic flux are

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M¹L^-2T¹A¹

MLT^-2A^-1

ML²T²A^-1

ML²T^-2A^-1

Output resistance of an op amp is

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High

Low

Zero

Equal to input resistance

After curie temperature.

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Ferromagnetic

Paramagnetic

Magnetic

Diamagnetic

The anodes in cathode ray oscilloscope.

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Control number of waves

Control brightness of sept formed

Accelerate as well as focus beam

Negative potential w.r.t to chithode

For electromagnetic waves, Maxwell generalized

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Gauses law for magnetism

Gauses law for eletricity

Fradays law

Amperes law

The critical temperature of mercury is.

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1.18 K

4.2 K

3.72 K

7.2 K

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

A real transformer does not change.

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Voltage level

Current level

Power level

Frequency

Flux through any closed surface is:

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1/ε²_∘ times the total charge enclosed in it

ε²_∘ time the total charge enclosed in it

1/ε_∘ ties the total charge enclosed in ti

ε_∘ time the total charge enclosed in it

A moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

A metal rod of 1 m is moving at a speed of 1 ms-1 in a direction making an angle 30^o with 0.5 T magnetic field . The emf produced is.

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0.25 N

2.5 N

0.25 V

2.5 V

When nitrogen is bombarded by alpha particles nitrogen nucleus changes into

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Oxygen

Carbon

Barium

Helium

By winding the coil around a less magnetic core, self induction.

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Will increase

Will decrease

Remain same

First increase then decrease

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

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