Question # 1

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

If an electron is prijected in a magnetic field with velocity V, it will experience a force

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The effective way to increase the sensitivity of moving coil galvanometer is.

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Increase the area of coil

Increase the number of turn

Increase the magnetic field

Increase the value of constant C

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

When a charge is projected perpendicular to a uniform magnetic field, tis path is

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Spiral

Helix

Ellipse

Circular

Useful device to measure resistance, current and voltage is an electronic instrument called.

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

A soft iron cylinder is placed inside coil galvanometer to:

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Make field circular and strong

Make field radial and weak

Make field radial and strong

All of above

Which one has the least resistance.

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Galvanometer

Ammeter

Ohm meter

Volta meter

A positive charge is moving towards an observer, The direction of magnetic induction will be.

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Toward right

Anti clockwise

Clockwise

Toward left

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

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upward

To ward right

Down ward

Toward left

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

The conductor experience force, placed in magnetic above:

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Move towards weaker part of field

Move towards stronger part of field

Remains at rest

Move upwards in space

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

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

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

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

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

Lorentz force means the force acting on a particle, which is

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Magnetic force only

Electric force only

Sum of electric and magnetic force

None of these

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