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Physics

Physics
What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?

12
24
36
50

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Physics
What type of simple machine is an axe?

Lever
Both A & B
The screw
Wedge

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Physics
Which of the following is an insulator?

Mercury
Carbon
Germanium
Glass

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Physics
For which one of the following does the centre of mass lie outside the body?

A ring
A cricket ball
A book
A fountain pen

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Physics
Weight of a body is maximum at the:

Subtropics
Tropics
Equator
Pole

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Physics
Period of oscillation of 3 cm microwaves in seconds is

1 × 1010
0.001
0.01
1 × 10–10

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