Water and Kerosine are drawn respectively into the two limbs of a Hare’s apparatus. The destiny of water is 1.0gcm−3 and the density of kerosine is 0.80gcm−3. If the height of the water column is 20.0cm, calculate the height of the kerosine column.
A. 1.6cm B. 16.0cm C. 20.0cm D. 25.0cm Correct Answer: Option D Explanation Devices with different liquids d1h1 = d2h2 1 × 20 = 0.8 × h h = 20/0.8 = 25cmIn semi-conductor, the carriers of current at room temperature are?
A. electrons only B. electrons and holes C. holes only D. electron and ions Correct Answer: Option B Explanation Electron and holes represent the negative and positive charge respectively.An a.c of 1A at a frequency of 800 cycles per second flows through a coil, the inductance of which is 2.5mH and the resistance of which is 5Ω. What is the power absorbed in the Coil?
A. 5W B. 6W C. 7W D. 8W Correct Answer: Option A A. 5WThree resistors with resistance 200Ω, 500Ω and 1kΩ are connected in series. A 6v battery is connected to either end of the combination. Calculate the potential difference between the ends of 200Ω resistance.
A. 0.71V B. 0.7V C. 0.82V D. 0.8V Correct Answer: Option A A. 0.71VProducts
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