Physics 9: Unit 1

The Number of Base Units in SI are...

• 3

• 6

• 7

• 9

Which one of the following units is not a derived unit?

• Pascal

• Kg

• Newton

• Watt

Amount of a Substance in terms of numbers is measured in...

• Grams

• Kg

• Newton

• mole

An interval of 200us is equivalent to...

• 0.2s

• 0.002s

• 2*10^-4s

• 2*10^-6s

Which one of the following is the smallest quantity?

• 0.01g

• 2mg

• 100u g

• 5000 ng

Which instrument is the most suitable to measure the internal diameter of a test tube?

• Meter Rule

• Vernier Callipers

• Measuring Tape

• Screw Gauge

A student claimed that the diameter of a wire as 1.032cm using Vernier Callipers, up to what extent do you agree with it?

• 1 cm

• 1.0 cm

• 1.03 cm

• 1.032

A measuring cylinder is used to measure...

• Mass

• Area

• Volume

• Level of a Liquid

A student noted the thickness of a glass sheet using a Screw Gauge on the main scale, it reads 3 divisions while 8th division on the circular scale coincides with index line. Its thickness is....

• 3.8 cm

• 3.08 mm

• 3.8 mm

• 3.08 m

Significant figures in an expression are...

• All the digits

• All the accurately known digits

• All the accurately known digits and the first doubtful digit

• All the accurately known digits and all the doubtful digits