Question # 1

The Unit of decay constant.

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Second

(second)-1

m-1

mk

The algebraic sum of potential change in a closed circuit is zero.

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Kirchhoff's 1st rule

Kirchhoff 2^nd rule

Krichoff's 3^rd rule

Kirchhoff 4^th rule

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.

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√2

1/√2

2

1/2

The A.M. transmission frequencies range from

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540 KHz to 1000 KHz

540 Khz to 1600 KHz

520 KHz TO 1600 KHz

520 KHz TO 1400 KHz

The sum of electric and magnetic force is called.

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Maxwell force

Lorentz force

Newton's force

Centripetal force

NIBA =

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cθ

θ/c

c²θ

c²/θ

Electric current produces magnetic field, was suggested by.

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Faraday

Oersted

Henry

Lenz

Balmer series lies in region of electromagnetic spectrum.

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Infrared

Visible

Ultraviolet

Fra infrared

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

For automatic Switching of streetlight, the op amplifier is used as.

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Inductor

Converter

Comparator

Thermistor

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

The condition of resonance is:

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XL = 1/2 Xc

X_L = X_c

X_c = 4_x2

None of above

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

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

The expression P = VI hold only when current and voltage are.

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In phase

Out of phase

At right angle to each other

At angle of 120 ^o

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

When platinum is it becomes orange at.

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500^oC

900^oC

1100^oC

1300^oC

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