Electrical Engineering- Electric Current and Ohm's Law
Electrical Engineering- Electric Current and Ohm's Law
31.
How many different combinations may be obtained with three resistors, each having the resistance R ?
- 3
- 4
- 5
- 6.
32.
A wire of 0.14 mm diameter and specific resistance 9.6 micro ohm-cm is 440 cm long. The resistance of the wire will be
- 9.6 ohm
- 11.3 ohm
- 13.7 ohm
- 27.4 ohm.
33.
Ohm's law is not applicable to
- DC circuits
- high currents
- small resistors
- semi-conductors.
35.
Least current will flow through
- 25 ohm resistor
- 18 ohm resistor
- 10 ohm resistor
- 5 ohm resistor
37.
A resistance of 5 ohms is further drawn so that its length becomes double. Its resistance will now be
- 5 ohms
- 7.5 ohms
- 10 ohms
- 20 ohms.
39. wire of resistance R has it length and cross-section both doubled. Its resistance will become
- 4 R
- 2 R
- R
- R / 4.
40.
Ohm's law is not applicable in all the following cases Except
- Electrolytes
- Arc lamps
- Insulators
- Vacuum ratio values.