CTET Solved Paper - UPTET October 2017 Paper2
116. In household wiring, what is the colour of 'earth wire'?
- Option : B
- Explanation : (B) In indict wires are in RGB mode.
i.e. Red-Green-Black. Each of these RGB wire have different functions. Red-Red wire signifies the phase in electric circuit. Black-Black wire signifies neutral wire. Green-Green wire stands for earthing is electric circuit.
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117. Kirchhoff's current law is based on the conservation of
- Option : C
- Explanation : (C) Kirchhoff's current law or junction rule states that "at any junction, the sum of the currents entering the junction is equal to the sum of currents leaving the junction". This law is based on the conservation of charge.
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118. The decimal equivalent of the binary number (1101)2 is
- Option : C
- Explanation : (C) The decimal equivalent of the binary number
(1101)2 = 23 × 1 + 22 × 1 + 21 × 0 + 20 × 1
= 8 + 4 + 0 + 1 = 13
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119. Which of the following is not a constituent of petroleum?
- Option : B
- Explanation : (B) Among the given options, constituents of petroleum are petrol, paraffin wax and lubricating oil. Coke is not related with petroleum.
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- Option : C
- Explanation : (C) M is copper (Cu) and black coloured product is copper (II) oxide.
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