Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

676.

The inner diameter of a small test tube can be measured accurately using a

A.

Micrometres screw gauge

B.

Pair of dividers

C.

Metre rule

D.

Pair of vernier calliper

Correct answer is D

A vernier scale is a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation; thereby increasing resolution and reducing measurement

677.

Calculate the effective capacitance of the circuit in the diagram given

A.

4μf

B.

3μf

C.

2μf

D.

1μf

Correct answer is D

No explanation has been provided for this answer.

678.

What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?

A.

100N

B.

90N

C.

80N

D.

120N

Correct answer is A

No explanation has been provided for this answer.

679.

An object moves in a circular path of radius 0.5m with a speed of 1ms\(^{-1}\). What is its angular velocity?

A.

8rads\(^{-1}\)

B.

4rads\(^{-1}\)

C.

1rads\(^{-1}\)

D.

2rads\(^{-1}\)

Correct answer is D

No explanation has been provided for this answer.

680.

In homes, electrical appliances and lamps are connected in parallel because

A.

less current will be used

B.

less voltage will be used

C.

parallel connection does not heat up the wires

D.

series connection uses high voltage

Correct answer is D

No explanation has been provided for this answer.