Question # 1

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

If force and displacement are in opposite direction, the work done is taken as

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Positive work

Negative work

Zero work

Infinite work

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:

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The coil is distorted

The coil is rotated

The coil is neither distorted nor rotated

Both A and B

None of these

The substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

The number if neutrons in the nucleus of ₉₂U²³⁵are

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Infinite

92

235

143

In a transistor, if the central region is n-type, then this type of transistor is known as

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n-p-n transistor

p-n-p transistor

either of these

none of these

The concept of field theory was put forward by

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Franklin

Kepler

Oersted

Michael Faraday

The most abundant isotope of neon is

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neon-20

neon-21

neon-22

neon-23

An vector of 10 N makes an angle of 45° with x-axis. Angle between its rectangular components with be:

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45°

90°

135°

Zero

Examples of crystalline solids are:

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Cooper

NaCl

Zirconia

Both (A) and (B)

All of these

When one mirror of Michelson interferometer is moved a distance of 0.5 mm. 2000 fringes are observed, the wavelength of light used is

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5000 nm

5000 A°

500 cm

2000 A°

To find wavelength of light by his experiment. Newton utilized:

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Principle of phase change

Snell's Law

Bragg's law

Both (A) and (C)

In projectile motion, the acceleration in horizontal is

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Maximum

Minimum

Zero

None of these

Which will be more effective in knocking a bear down

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A rubber bullet

Lead bullet of same momentum

A wood bullet

None of these

As the droplet accelerates the net force acing on it is

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Increase

Decreases

Zero

None of these

Shear modulus for tungsten is

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50

100

150

200

The whole structure obtained by the repetition of unit cell is known as

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Unit cell

Crystal lattice

Ore

All of these

The work done in placing a charge of 8 x 10^-18C on a condenser of capacity 100 μ F is

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32 x 10^-32 j

16 x 10^-32j

3.1 x 10^-26j

4 x 10^-10j

A mass of 5 kg moves with an acceleration of 10m s^-2, the force applied is

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10N

50N

2N

20N

The biological sciences deal with the

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Living things

Non-living things

Both

None of these

If the wavelength of light used in Michelsion's interferometer is 400 nm and the moveable mirror only moved throughλ/4, then the length moved will be

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10 nm

10^-2mm

1 nm

10^-4mm

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