Question # 1

A battery is used in

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ohmmeter

Ammeter

Galvanometer

Voltemeter

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

A galvanometer is an electrical instrument used to

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Measure resistance

Measure voltage

Detect passage of current

None of these

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

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

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

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ms-2

ms

ms^-1

m-1s-1

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

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

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

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

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

To convert a galvanometer into a volt meter a high resistance is connected.

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In series

In parallel

In perpendicular

Along tangent

Magnetism is related to:

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Stationary charges

Moving charges

Stationary & Movingcharges

Law of motion

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

If the length of solenoid is doubled but N same, B inside the solenoid becomes.

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Half

Doubled

One fourth

Four times

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 sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

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Perpendicular to field

Parallel to field

At an angle of 60 ^o to the field

None of these

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

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

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