Class X

. When resistances (R1, R2, R3...) are connected in series, their equivalent resistance is equal to the of the individual resistances. i.e. R = __________
  1. 18 Ω
  2. work done, 1J(1 Joule)
  3. Ohm-meter (Ωm)
  4. sum, R = R1 + R2 + R3 + ...
An electric fuse is based on
  1. the heating effect of the current
  2. the chemical effect of the current
  3. the magnetic effect of the current
  4. none of these
  According to ohms law,
  1. The resistance increases with the increases in current.
  2. The resistance increases with the increases in voltage.
  3. The current increases with the increases in voltage.
  4. The resistance and current both increases wiyh the increases in voltage.
When two resistances of 6 Ω and 12 Ω are connected in series then the effective resistance is _____.
  1. 4 Ω
  2. parallel
  3. work done, 1J(1 Joule)
  4. 18 Ω
On which of the following no “plus” or “minus” sign is marked
  1. a battery
  2. an ammeter
  3. a voltameter
  4. a resistor
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