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Q. Roentgen discovered
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Q. A periscope works on the principle of
Q. The conversion of sulphur dioxide into sulphur trioxide in the contact process is a/an
Q. The dimension of which of the following is the same as that of impulse ?
Q. Danger signals are generally red as red light
Q. When temperature is gradually decreased the specific heat of substance is
Q. The surface tension of water on adding detergent to it
Q. Transformer cooling and insulation oil must be of ?
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