51. A wire has the resistance 9Ω. Its radius becomes double then the new value of resistance of the wire is :
52. When two resistors are connected in parallel, have . . . . . . . .
53. A conductor having some appreciable resistance is called a
54. Wheatstone bridge is used for measurement of-
55. . . . . . . . . are also known as heat waves.
56. Which of the following devices converts chemical energy into electrical energy?
57. A 100 W electric bulb is used for 10 h/day. How many units of energy are consumed in 30 days?
58. $$R = \frac{{{R_1}{R_2}}}{{{R_1} + {R_2}}}$$ the formula represent?
59. The dynamo converts
60. If the resistance is reduced to half, the current . . . . . . . .
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