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Physics

Physics
The unit of intensity of electric field is

N/c
N/m
Volt
J/c

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Physics
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :

1.2
1
2
1.5

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Physics
Which among the following determines the pitch of a sound?

Frequency
Wavelength
Amplitude
Loudness

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Physics
One should not connect a number of electrical appliances to the same power socket because

the appliance will not get full voltage
this can damage the electrical meter
this can damage the domestic wiring due to overloading
this can damage the appliances due to overloading

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Physics
The point where total mass of a body is supposed to be concentrated is known as

Dead centre
Centre of gravity
Centre of motion
Centre of mass

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Physics
When the main switch of the house is put off it disconnects the

Live wire and the earth wire
Live wire only
Earth wire and the neutral wire
Live wire and the neutral wire

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