Question # 1

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:

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Refract only

Reflect only

Partially refract and partially reflect

Diffract only

Joule's law is W = ____________________

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IR/t

IRt²

IR²t

I²Rt

What type of graph is in between V and I?

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Curved

Parabola

Straight line

None of these

Which we double the voltage in a simple electric circuit. We double the

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Current

Power

Resistance

both a and b

The diameter of spherical mirror is called:

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Curvature

Aperture

Sphere

Both a and b

Mathematical formula of electromotive force (e.m.f) is:

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E = W/Q

E = Q/W

E = WQ

E = W2Q

We can distinguish between the notes of a piano and flute due to ………… of sound.

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Loudness

Pitch

Quality

Intensity

In medical field, C.R.O is used to display:

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Heart beats

Pictures of organs

Pictures of bones

Blood pressure

The index of refraction depends on:

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The focal length

The speed of light

The image distance

The object distance

The unit of potential difference is:

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Volt

Coulomb

Ampere

Joule

An object is placed at the Centre of curvature of a concave mirror. The image produced by the mirror is located:

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Out beyond the centre of curvature

At the centre of curvature

Between the centre of curvature and the focal point

At the focal point

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Mirror

Lens

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