Question # 1

Which of the following is typical source of alpha particle.

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Strontium -94

Radon -222

Cobalt -60

Zic sulphate

The reciprocal of decay construct lamda of a radioactive element is.

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Half life

Mean life

Curie

total life

the current which flows from a point at higher. potential to point at lower potential is called.

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Electric current

Conventional current

Either of these

None of above

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

In metal detector, we use.

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L-C circuit

R-L circuit

R-C circuit

RLC series circuit

Electric potential at a distance ''r'' from ''q'' is:

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V_r = 1/54πε_∘q/r₂

Vr=1/4πε_∘²q/r

V_r=1/4πε_∘2q/r

V_r=1/4πε_∘q²/r

Soft magnetic material is

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Sodium

Steel

Iron

Copper

The mass spectrum of naturally occurring neon shows the most abundant isotope has atomic mass.

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19

20

21

22

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

Photo diode is used for detection of.

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Heat

Magnet

Current

Light

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

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 highest value reached by the voltage or current in one cycle is called.

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Peak ot peak value

Peak value

Instantaneous value

Root mean square value

The amount of energy equivalent to 1 a.m.u is

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931.5 MeV

93.15 MeV

9.315 MeV

2.224 MeV

Wave nature of particle was given by:

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Clemensen

Louis de Broglie

Laster H. Germer

Clinton S. Davisson

The temperature of core of nuclear reactor is:

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1100°C

1200°C

1300°C

1400°C

An electromagnetic wave goes from air to glass which of the following does not change?

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Radio waves

X-rays

Ultra violet radiation

Ultra sond waves

OR gate is represented by:

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X = A+B

X=A.B

X=A+B

X=A.B

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