Question

1. The eardrum enables us to hear sounds because of which of its following structural features?
A. Soft tissue

B. Stretched membrane

C. Cone shape

D. Cartilaginous ring

2. What is the minimum loudness above which the sound becomes physically painful for human beings?

A. 40 dB

B. 80 dB

C. 120 dB

D. 140 dB

3. A tester is used to test the conductivity of three liquids namely A, B and C. It is seen that the bulb glows dimly

when tested with liquid A, it glows brightly when tested with liquid B and does not glow at all when tested with

liquid C.

Which of the following is a correct conclusion of this experiment?

A. Liquid A is the best conductor of electricity among the three liquids.

B. Liquid C is the best conductor of electricity among the three liquids.

C. Liquid C is the poorest conductor of electricity among the three liquids.

D. Liquid B is the poorest conductor of electricity among the three liquids.

4. In an electroplating experiment, the electrolyte is nickel sulphate. The cathode is a steel plate. What should be

the anode for the experiment to be successful?

A. Aluminium

B. Copper

C. Steel

D. Nickel

5. An instrument consists of a vibrating system with a pen, which on experiencing tremors vibrates and records a

pattern that indicates the force of the tremor. This instrument can be used to measure the magnitude of

______________.

A. lightning

B. electric current

C. earthquakes

D. temperature

6. Tsunami means the... .

A. heavy earthquake

B. floods in rivers

C. earthquake under the sea

D. eruption of volcano in the sea​

Answer 1

Answer:

Hope youre not cheating ;)

Explanation:

1 D

2 D

3 A

5 Earthquakes of any sort