Question # 1

The strength of magnetic field around the current conductor is

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Smaller near the conductor

Greater near the conductor

Greater at the large distance from the conductor

Constant near and away from the conductor

A voltmeter is used to measure the

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potential difference

current

temperature

resistance

Lorentz force is defined as

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q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

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F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

In order to make a voltmeter, high resistance is connected with galvanometer, in

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perpendicular

may be paralled or pendicular

series

none of these

A relationship between Gauses of magnetic induction and Tesla(T) is given by

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G 10^-3T

G = 10^-2T

G = 10^-4T

G = 10^-1T

A beam of electrons is provided by an

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electron gun

Suppray

Injection

None of these

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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90°

75°

0°

180°

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

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magnetic flux

magnetic induction

magnetic field

self inductance

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

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Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

The magnetic field in the middle of a solenoid due to current is

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weak

strong and uniform

none-uniform

zero

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

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0

1

0.5

-1

Resistance is measured in

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volts

ampere

ohm

watt

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