# Pre Test Physics Science Club

15 Questions | Total Attempts: 182

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• 1.
The diagram shows a thick-walled tube. The thickness of the wall is 2 mm. What is the internal diameter d of the tube?
• A.

2.8 cm

• B.

3.2 cm

• C.

3.4 cm

• D.

7.4 cm

• 2.
The mass and density of four objects are given in the table.Which object has the largest volume?
• A.

A

• B.

B

• C.

C

• D.

D

• 3.
A container is filled with water of density 1000 kg/m-3 to a height of 0.2 m. The base of the container is accidentaly broken and water leaks out from a tiny hole of area 2.0 x 10-6 m2 . to prevent water from leaking out, a sticky tape is adhered over the tiny hole. (take g= 10 N/kg) What is the minimum force the tape must be able to withstand?
• A.

0.002 N

• B.

0.004 N

• C.

2000 N

• D.

4000 N

• 4.
When a resultant force of 6.0 N is applied to mass of 3.0 kg, the acceleration of the mass will be
• A.

0.5 m s-2

• B.

2.0 m s-2

• C.

3.0m s-2

• D.

18.0m s-2

• 5.
A cumin canister of mass m: 5.0 kg slides across a horizontal frictionless counter with speed v= 0.40 m/s. It then runs into and compresses a spring of spring constant k = 500 N/m. distance d is the spring compressed?
• A.

2 cm

• B.

4 cm

• C.

6 cm

• D.

8 cm

• 6.
A brick of mass 0.8 kg is accidentally dropped from a high scaffolding. It reaches the ground whit a kinetic energy 240 J. How high is the scaffolding ?
• A.

19 m

• B.

300 m

• C.

192 m

• D.

30 m

• 7.
A machine is able to lift 200 kg of bricks vertically up to a height of 30 m above the ground in 50 s. What is the power of the machine ?
• A.

0.12 kW

• B.

1.2 kW

• C.

6.0 kW

• D.

300 kW

• 8.
An electric kettle of power 800 W raises the temperature of 1 kg of water by 200C in three minutes. How much energy is wasted ? (Specific heat capacity of water, 4200 J kg-10C-1 )
• A.

2400 J

• B.

4200 J

• C.

60000J

• D.

120000 J

• 9.
The diagram shows a wave. How many wavelengths are there between X and Y?
• A.

3/2

• B.

1

• C.

1/2

• D.

3

• 10.
Music is produced by the loudspeaker of a radio. Which property of the sound wave increases when the music is made louder?
• A.

Amplitude

• B.

Frequency

• C.

Speed

• D.

Wavelength

• 11.
A sonic ‘tape measure’ is used to measure the length of a room. It measures a time interval of0.060 s between transmitting a sound pulse and receiving the echo. The speed of sound in air is330 m / s.How far is the reflecting wall from the ‘tape measure’?
• A.

5.5 m

• B.

9.9 m

• C.

11 m

• D.

20 m

• 12.
A concave mirror of focal length 20.0 cm produces an image (virtual) whose hight is two times that of the object.  The characteristics of image are ....
• A.

Image distance -20.0 cm, upright

• B.

Image distance -20.0 cm, inverted

• C.

Image distance 60.0 cm, upright

• D.

Image distance 60.0 cm, inverted

• 13.
A plastic rod is rubbed with a dry cloth and becomes positively charged. Why has the rod become positively charged?
• A.

It has gained electrons.

• B.

It has gained neutrons.

• C.

It has lost electrons.

• D.

It has lost neutrons.

• 14.
Why is electrical energy usually transmitted at high voltage?
• A.

As little energy as possible is wasted in the transmission cables.

• B.

The current in the transmission cables is as large as possible.

• C.

The resistance of the transmission cables is as small as possible.

• D.

The transmission system does not require transformers.

• 15.
A light bulb is marked 12 V, 6 W. When lit by a 12 V battery, what is the current?
• A.

0.5 A

• B.

2 A

• C.

6 A

• D.

12 A12 A

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