Question # 1

At mean position of pendulum, the potential energy of the pendulum is:

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Maximum

Minimum

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Both a and c

A converging lens becomes a magnifying glass when an object is placed:

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Outside of focal length

Inside the focal length

Equal of focal length

At double of focal length

The speed of sound of water at 25 ^oC is:

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1530 ms^-1

1531 ms^-1

1560 ms^-1

1570 ms^-1

In simple pendulum motion, restoring force is provided by:

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Air resistance

Tension in the string

Inertia

Weight of the body

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

To protect the gold leaves of electroscope from the external electric disturbances, the aluminum foil is grounded by a thin wire, which is made up of:

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Aluminum

Silver

Copper

Brass

Electric field lines were introduced by:

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Faraday

Newton

Coulomb

Joule

Example of mechanical waves is:

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Radio waves

X-rays

Light waves

Sound waves

The speed of sound in are water at 25°C is:

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1530ms-1

1531ms-1

1560ms-1

1570ms-1

Which of the following is a method of energy transfer:

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Conduction

Radiation

Wave motion

All of these

The speed of light in water is:

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2.0x10³ ms^-1

2.5x10³ ms^-1

2.3x10⁸ ms^-1

2.3x10^-8 ms^-1

For the emission of electrons from the tungsten filament the values of current and voltage are taken as:

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0.1 A and 2V

0.2 A and 4V

0.3A and 6V

0.4A and 8V

The SI unit of electric field intensity is:

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NC-2

NC-1

Ns

Nm-1

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10th Class Physics English Medium KPK Boards Online Mcqs MCQs With Answers

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