A:-Maharashtra
B:-Tamil Nadu
C:-Karnataka
D:-Kerala
Correct Answer:- Option-D
Question20:-The name of the boat Kumaranasan was travelling while he met an accident that caused his death
A:-victoria
B:-Redeemer
C:-Kairali
D:-None of these
Correct Answer:- Option-B
Question21:-A semiconductor diode is used to
A:-convert de to ac
B:-convert ac to dc
C:-increase voltage
D:-decrease voltage
Correct Answer:- Option-B
Question22:-A steady current is flowing in a power line from west to ல்‌ The direction of the magnetic field at a point
below the power line is towards
കടട
B:-west
C:-north
D:-south
Correct Answer:- Option-C
Question23:-Polarization of light is a convincing evidence of it's
A:-Longitudinal nature
B:-Transverse nature
C:-Dual nature
D:-Quantum nature
Correct Answer:- Option-B
Question24:-A hollow metal sphere of radius 2 cm is charged such that the potential on it's surface is 5 volts. The potential
at the centre of the sphere is

A:-5 volts

B:-zero

C:-same as at a point 2 cm away from the surface

D:-none of these

Correct Answer:- Option-A
Question25:-An athlete completes one round of a circular track of radius 'l
minutes 20 seconds will be

28ھ

B:-zero

6:28

D:-4R

Correct Answer:- Option-B
Question26:-At high altitudes, the boiling point of water decreases because

A:-the atmospheric pressure is high

B:-the temperature is low

C:-the atmospheric pressure is low

D:-the temperature is high

Correct Answer:- Option-C
Question27:-The monomer of natural rubber is

A:-Isoprene

B:-1,3-butadiene

C:-Chloroprene

D:-Ethylene

Correct Answer:- Option-A
Question28:-Due to Frenkel-defect the density of the ionic solids

A:-Decreases

B:-Increases

C:-Does not change

in 40 seconds. His displacement at the end of 2