Question # 1

When a body moves to and fro about a point its motion is called:

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Random motion

Linear motion

Vibratory motion

Rotatory motion

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

1 volt is equal to:

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JC

JC^-1

JC^-2

JC^-3

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

The unit of power is _________

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Volt

Watt

Joule

Coulomb

The distance of spherical mirror is called:

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Curvature

Aperture

Sphere

a,b

The equivalent resistance in parallel combination is:

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R_c=R₁+R₂+R₃ +.................+R_n

R_c=1/R₁+1/R₂+1/R₃+.................+1/R_n

a and b

None of these

The unit of (ρ) in formula R=ρ.L/a is______________.

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Ω

Ω-m

Ω-m²

Ω-m^-2

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

the waves have properties:

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reflection

refraction

diffraction

all of these

In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i- called:

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Electrostatics

Electrostatic induction

Magnetism

Electromagnetic induction

The turn ratios of a transformer is 10. It means.

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I_s = 10I_p

N_s = N_p

N_s = 10 N_p

V_s =V_p /10

The frequency of silent whistle is:

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20,000 Hz – 25000Hz

2000 Hz – 2500Hz

200 KHz – 2000 Hz

25000 KHz

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