Question # 1

Force on a charged particle is zero when projected at angle with magnetic field.

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0 ^o

90^o

180^o

270^o

The dimensions of magnetic flux are

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M¹L^-2T¹A¹

MLT^-2A^-1

ML²T²A^-1

ML²T^-2A^-1

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

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

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Voltage

Current

Resistance

None

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

The sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

Which one has the least resistance.

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Galvanometer

Ammeter

Ohm meter

Volta meter

μ_∘(Ampere's constant) has value.

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4πx10^-7 WbA^-1m^-1

4πx10^-17 Wbm²

4πx10⁷ WbA^-1m^-1

4πx10-27 Wb/m²

The magnetic flux will be max, For an angle of:

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0°

60°

90°

180°

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

Grid in cathode ray oscilloscope controls.

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Number of electron

Temperature of filament

Frequency of electron

Energy of electrons

e/m=

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v/Br

Br/V

VB/r

Vr/B

The sum of electric and magnetic force is called.

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Maxwell force

Lorentz force

Newton's force

Centripetal force

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

The function of three anodes a C.R.O is

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To accelerate electrons only

To focus the electrons only

To control the brightness of spot on screen

To accelerate and focus the electrons

The unit of magnetic induction is:

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Tesla

Weber

Weber metre

NAm^-1

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