Question # 1

Electron gun has an electrode called for controlling the flow of electrons in the beam:

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Plate

Grid

Screen

Filament

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

AND operation is represented by:

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Dot (.)

Addition (+)

Division (÷)

Minus (-)

Resistance of conductor is directly proportional to:

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Length

Pressure

Area

All of these

In OR operation inputs are connected as:

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Series

Parallel

Both series or parallel

None of these

What type of graph is in between V and I?

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Curved

Parabola

Straight line

None of these

The resistance of voltmeter is:

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zero

low

Very high

10Ω

The current used in houses is:

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A.C.

Conventiona current

Current

D.C

J.J Thomson observed deflection of cathode rays in:

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1895

1896

1897

1998

A conductor of electric current is:

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Wood

Rubber

Plastic

Copper

Specific resistance of silver = ________ x 10^-sOhm-meter

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5.25

2.75

1.69

1.62

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror:

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-4.1 cm

-8.2 cm

-9.9 cm

-20 cm

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Physics 10th Class English Medium Unit 5 Online Test MCQs With Answers

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