Question # 1

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

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

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

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0°

60°

90°

180°

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

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

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

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

The value of e/m is smallest for

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Proton

Electron

Beta particle

Positron

Grid in cathode ray oscilloscope controls.

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Number of electron

Temperature of filament

Frequency of electron

Energy of electrons

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

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

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 sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

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None of the above

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

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

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Spiral

Helix

Ellipse

Circular

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